Year-round Alternatives to “No Mow May”

Posted on October 16, 2023 by Signe Danler

In the recent blog post “The Controversy Surrounding ‘No Mow May”, Dr. Langellotto explores the lack of good science supporting the idea of giving your lawn a month-long break from being mowed. Despite the scientific controversy, “No-mow May” is an idea that has taken off. It is simple and makes people feel good about helping pollinators, while also doing less yard work. At its best, it may indeed work in some places, for some people, to help some pollinators for a month…but what about the rest of the year?

A month of neglecting your lawn might allow flowers to bloom, depending on what grows in your lawn besides grass. These may well attract pollinators – but the untended expanse may also fool various creatures into thinking they have a safe place to nest, pupate, and burrow. What happens to them when the mowing starts again? Bees and butterflies can fly away to other flowers, but less-mobile creatures may be killed or displaced.

It’s also questionable whether this method reduces yard work at all. A lawn grown long and lush in peak growing season – and which may be wet from spring rains as well – will be very difficult to mow after a month. So at best, “No-mow May” provides a very short-term benefit, and may cause more problems than it solves.

Are there other routes to a low-maintenance pollinator paradise?
Definitely! As Gail concluded, a pollinator garden provides year-round support to pollinators, without the disruption of intermittent mowing. If you want detailed information on creating a pollinator garden in the PNW, and what to plant in it, here’s a good resource to get you started: “Enhancing Urban and Suburban Landscapes to Protect Pollinators”, https://extension.oregonstate.edu/catalog/pub/em-9289-enhancing-urban-suburban-landscapes-protect-pollinators.

But maybe you aren’t able to devote a whole garden to pollinators. Maybe you just have a little bit of space. How about planting just a few strategic plants?

Garlic chives, a white Allium) next to purple Douglas aster — Garlic chives (Allium) with Douglas aster (dwarfed by tight location) in fall

Certain types of plants are pollinator powerhouses. They tend to attract a wide variety of pollinators. Some are food plants for many different native butterfly and moth caterpillars. The best bloom for a long time, offering their bounty for up to several months. To extend the bloom season even more, plant several varieties of the same species, with varying bloom times, or multiple related species.

Include a few of these in any landscape and you will benefit many pollinators. Choose natives when you can, and choose at least one species from each family or general category.

Syrphid fly on Douglas Aster — It’s not just bees: Syrphid fly on Douglas aster

Pollinator Powerhouse starter list
In western Oregon, you could do worse than start with the Garden Ecology Lab’s Top 10 Oregon Native Plants for Pollinators (https://blogs.oregonstate.edu/gardenecologylab/category/top-10-plants-for-pollinators/) and their relatives. (Top-10 are in bold below).

Aster family (Asteraceae) – Daisies or Composites.
A huge family with many pollinator favorites. Here are just a few.
Achillea millefolium (yarrow)
Anaphalis margaritacea (pearly everlasting) NOT for a well-fed and watered area, or it can become invasive
Eriophyllum lanatum (Common woolly sunflower)
Solidago spp. (goldenrod) – Plant Native S. canadensis (Canada goldenrod), miniature S. ‘Little Lemon’, and late and showy S. ‘Fireworks’ for a really long season of bloom! Be aware that most tend to spread by seed, and the birds won’t eat all the seed. Seedlings are easy to pull, though, if you don’t want too many.
Symphyotrichum/Aster – Tall native S. subspicatum (Douglas aster) or short native S. hallii (Hall’s aster), miniature S. ‘Woods Blue’, and many others.
Also: Echinacea (coneflower), Erigeron (fleabane), Helenium (sneezeweed – for treating sneezes, not causing them), Helianthus (perennial sunflowers), Inula, and many more.

Mint family (Lamiaceae)
Another really big family almost universally attractive to pollinators. Includes Agastache spp. (anise hyssop, hummingbird mint), Calamintha nepeta (calamint), Caryopteris x incana (bluebeard – a small shrub), Monarda didyma (bee balm), Salvias, and herbs rosemary, mint, basil, oregano, and thyme, among others.

Calamintha and Alliums in midsummer (Wisconsin)

Sedum/Hylotelephium (stonecrops)
Both the low groundcover Sedums and the tall, fall-blooming Hylotelephiums like ‘Autumn Joy’ are pollinator magnets , though often you will only see honeybees mobbing them.

Alliums – Any kind
There are spring, summer and fall bloomers – plant some of each, mixed in with other pollinator plants. Late spring to summer is the main Allium season, with dozens of kinds available. For late summer and fall try Allium tuberosum (Garlic Chives), Allium cernuum (nodding onion), a NW native, and Allium thunbergii ‘Ozawa’ (Ozawa Japanese onion) for the very end of autumn.

Self-sowing annuals
Many annuals will bloom straight through the season until frost.
Alyssum, Clarkia amoena (Farewell-to-spring), Eschscholzia californica (California poppy) (mostly annual), Fagopyrum esculentum (Buckwheat) – a great cover crop, pollinators love it, and you can harvest the seeds to eat or let it self-sow; Gilia capitata (globe gilia), Limnanthes douglasii (NW native), Madia elegans (common madia), Phacelia heterophylla (Varileaf phacelia).

Late summer: *Crocosmia*, *Agastache, Solidago* (left to right)

To make sure your pollinator powerhouse plants thrive and bloom for a long time, make sure to give them good growing conditions.
• Soil should be reasonably good (though not excessively fertilized, which can cause pest-attracting lush growth and fewer flowers).
• They should have full to half-day sun in most areas.
• Even native plants appreciate some water during dry summer months, otherwise they will go dormant.
• Grouping these plants together can make care easier – voila, a pollinator garden! – but they can be tucked into any available spot as long as their needs are met. Even a vegetable garden!

Queer Entomology

Posted on July 26, 2023 by Jen Hayes

On the last day of pride month, I read an article that brought me to tears: Can Entomology Emerge as a Role Model Field of Study for LGBTQ+ Inclusion and Visibility? by Michael C. Cavallaro. This year has been extremely difficult for the LGBTQ+ community, and to read about the successes and progress made in my field towards LGBTQ+ inclusion warmed my heart and gave me hope for my fellow queer bug lovers.

Before we dive in to the article, I want to share why this topic is important to me. I identify as a queer entomologist in two ways: 1) I am queer and I am an entomologist, and 2) I am interested in the ways that entomology expands and defies western understanding and expression of gender. The natural world, especially insects, teaches us that queerness is inherently natural and expressed in diverse ways.

View this post on Instagram

A post shared by Abejas del Valle (@apifauna)

//www.instagram.com/embed.js

Image description: An intersex bee from the genus Agapostemon. The right side presents characteristics that typify a female Agapostemon: green metallic abdomen, robust legs with pollen carrying hairs, shorter, thicker antennal segments. The left side presents male characteristics, including a yellow and black striped abdomen, yellow legs with fewer hairs, and elongated antennal segments.

Cavallaro begins the article discussing “Shared Traits: Entomologists and LGBTQ+ Folks” by Rae Olsson, which mirrors many conversations I have had with my fellow queer entomologists. Us folks who grow up chasing, collecting, and admiring insects tend to be viewed as weird, odd, or even outcasts. Queer folks are often far too familiar with the feeling of being marginalized, othered, and at odds with society. But, there is an odd comfort in knowing that you are a weirdo studying something weird.

The article continues, noting the advances that ESA (The Entomological Society of America) has made in providing an inclusive environment for LGBTQ+ folks and elevating their voices. We have seen these advances in the form of inviting people to include their pronouns on the annual event badges, introducing symposia on Diversity, Equity and Inclusion (DEI) issues, and removing states with anti-LGBTQ+ laws from potential future meeting locations. He also points out recently identified insects that have been bestowed names of queer icons, which I wrote about during last year’s pollinator week post.

IMAGE DESCRIPTION: A Cowpea weevil, which has long antennae and brown and white spots on its elytra. female cowpea weevils are known to mount other female cowpea weevils. Photo © Gene H on iNaturalist.

Cavallaro reports that 7.2% percent of ESA members have identified themselves as LGBTQ+, which reflects the U.S. national average. He notes that STEM still has many barriers to overcome as it is “rooted in a competitive and heteronormative culture” and “workspaces for queer-spectrum STEM professionals and students can be unsupportive and exclusionary.” Both STEM and entomology still have a long way to go in terms of acceptance, encouragement, and representation of queer folks.

As someone who attended a prestigious field entomology program and was called a “disney princess” on the first day, I can attest to the flippancy with which queer folks and femme-presenting folks are often treated in professional entomological spaces. It is, however, validating to witness the largest entomological organization in the U.S. taking the time to address, welcome, and better their ability to support their LGBTQ+ membership.

2022 Field Update: Native plants & native cultivars

Posted on December 26, 2022 by Jen Hayes

This summer we completed our third and final field season surveying pollinator visitation to native plants and native cultivars! We will maintain our experimental garden for one additional season, to finish up some plant measurements and data collection missed in our initial three seasons. This post will serve as a 2022 field update in addition to summarizing some of our preliminary results from our field observations!

Study Plants (2020-2022)

*Discontinued in 2021 due to lack of vigor and availability of replacement plants
**Added in 2021 to replace removed plants
*******Discontinued after 2020 due to taxonomic inconsistencies

Scientific Name	Common Name	Plant Type
Achillea millefolium	Yarrow	Native
Achillea millefolium ‘Calistoga’*	Yarrow	Cultivar
Achillea millefolium ‘Salmon Beauty’	Yarrow	Cultivar
Achillea millefolium ‘Moonshine’**	Yarrow	Cultivar
Aquilegia formosa	Western Red Columbine	Native
Aquilegia x ‘XeraTones’		Cultivar (hybrid)
Camassia leichtlinii	Great Camas	Native
Camassia leichtlinii ‘Caerulea Blue Heaven’	Great Camas	Cultivar
Camassia leichtlinii ‘Sacajawea’	Great Camas	Cultivar
Symphyotrichum subspicatum	Douglas’ Aster	Native
S. subspicatum ‘Sauvie Sky’	Douglas’ Aster	Cultivar
S. subspicatum ‘Sauvie Snow’	Douglas’ Aster	Cultivar
Clarkia amoena	Farewell-to-spring	Native
Clarkia amoena ‘Aurora’	Farewell-to-spring	Cultivar
Clarkia amoena ‘Dwarf White’	Farewell-to-spring	Cultivar
Clarkia amoena ‘Scarlet’**	Farewell-to-spring	Cultivar
Eschscholzia californica	California Poppy	Native
E. californica ‘Mikado’	California Poppy	Cultivar
E. californica ‘White’	California Poppy	Cultivar
E. californica ‘Purple Gleam’**	California Poppy	Cultivar
Nemophila menziesii	Baby Blue Eyes	Native (California)
N. menziesii ‘Penny black’	Baby Black Eyes	Cultivar
N. menziesii ‘Snow White’	Baby Blue Eyes	Cultivar
Sidalcea asprella ssp. virgata*******	Rosy checkermallow	Native
Sidalcea malviflora ‘Purpetta’*******		Cultivar
Sidalcea malviflora ‘Party Girl’*******		Cultivar

We conducted 5-minute visual observations on our study plants over three seasons. During these observations, we recorded all insects that interacted with a plant. These interactions included foraging, resting, basking, mating, etc. We recorded insect IDs to morphological group levels, as many bees are hard to identify to species in the field! We were able to identify common bumble bees, honey bees, butterflies, and a few other insects to the species level, but many were identified to groups for ease (e.g. ‘green bees’, ‘black bees’, ‘leafcutter bees’).

Field Season Stats

Year	# Sample Dates	# Collected Pollinators	# Observed Pollinators
2020	28	2159	6238
2021	33	2471	6225
2022	29	~2000	~4700

Number of sampling dates, total number of collected pollinator specimen (via insect vacuum), and cumulative pollinators observed during 5-minute observations for each of our three field seasons.

Is there a difference in native bee visitation to native plants and their cultivars?

Graphs of cumulative and mean foraging native bees from 5-minute observations conducted over three field seasons. Plant Type (y-axis) is abbreviated with a 6 letter code, e.g. “SYMSUB” = *Symphyotrichum subspicatum* = Douglas’ Aster. Natives have a box around each bar, and cultivars can be identified by an underscore followed by 1-2 letters, e.g., SYMSUB_SN = *Symphyotrichum subspicatum* ‘Sauvie Snow’ = a native cultivar of Douglas’ Aster with white petals.

Our initial graphs show a subtle preference for native types by native bees. Douglas’ Aster, California Poppy, Farewell to Spring, and Columbine (4/7) have higher visitation by native bees when looking at cumulative and mean counts. The difference is marginal for Douglas’ Aster, but trends for the other three plants are strong. The remaining three species (Yarrow, Baby Blue Eyes, Camas) are difficult to assess, based on these figures alone.

Across these seven species, we do see differences in visitation between natives (wild types) and native cultivars. Whether these differences are statistically significant, and whether there is a trend across all plant groups, remains to be seen!!!

Subscribe to the Garden Ecology Blog to receive future updates on native-cultivar research and more news from the lab.

I want to recognize my amazing Bee Team this year, as this field season would not have been possible without them! I am grateful for all of their hard work and their success in managing this project while I was away numerous times this season. They are thoughtful, inquisitive, and resourceful students, all of whom would make amazing lab or field technicians upon their graduation this spring! Nicole is not pictured below, but also deserves recognition for all her contributions to this project. Thank you all 🐝

Svea working on her ultraviolet photography

What are bees doing right now? Fall Edition

Posted on October 13, 2022 by Mallory Mead

The sunny days are diminishing as summer rolls into autumn, and as the sun descends, the bees’ flight lulls to rest. Bees sense and respond to light and use the sun to orient themselves and navigate. Along with their two large compound eyes that are used for vision, bees have three simple eyes that sit atop their their heads in a triangular formation. These are called ‘ocelli’ and they sense light.

Originally posted by postgraduate student Hamish Symington, this video shows bees being studied by fellow student Kristina Buch in the Cambridge University Botanic Garden.

Ocelli can be seen atop the head between the compound eyes. Photo of bee from the genus Triepeolus by Mallory Mead.

There is a video circulating the internet of honeybees flying in an enclosure in a laboratory. The video shows the researcher turning off the lights in the enclosure, causing the bees to drop to the ground instantaneously, showing how honeybees will not fly in the absence of light.

We notice similar behavior in the field on days where clouds pass over the sun intermittently. When the sky is bright, our plants bustle with pollinators, and when shadows come over, most bees are suddenly out of sight. It makes sense that as the days get shorter and colder the sight of pollinators will become more and more fleeting!

Some bees are still coming out during the warm October afternoons, and collecting their final energy reserves for the winter. Goldenrod, Douglas’ aster, California poppy, bee balms, and black-eyed Susan, amongst other late blooming pollinator plants are still providing bees with nectar and pollen during this time of transition.

Purple Aster and goldenrod in a natural meadow. Photos by Mallory Mead.
Goldenrod in meadow.
A long horned bee and a sweat bee on black-eyed Susan (Rudbeckia hirta).
Metallic green sweat bee on Scabiosa.

During this season, honeybees and bumblebees predominate the landscape, while long-horned bees (genus: Melisoddes), leafcutter bees (genus: Megachile) and sweat bees (family: Halictidae) can still be seen as they finish up resource collection in the Willamette Valley.

Social bees

Honeybees must make enough honey before temperatures drop and they can no longer leave the hive, so you’ll find them foraging for pollen and nectar as late in the season as possible.

In late summer and fall we begin to see an influx of bumblebee queens. During the summer, the queens are busy reproducing in their underground hives, while worker bees take to the landscape. However, near the end of the foraging season, new queens hatch and fly out to find mates and food. You may see bumblebee queens getting their last bits of food energy before overwintering, while the rest of the colony (males and workers) dwindle away.

Black tailed Bumble Bee (Bombus Melanopygus) © Erin Forrester, some rights reserved (CC-BY-NC)

Check out this guide to Bumble Bees of the Western United States to see which Bombus species are found in your region and what time of year they are active.

Solitary Bees

Leaf, mud and petal nests are capped and ready for winter! Photos by Mallory Mead.
Petal nest in bamboo.

Many solitary bees are finishing their last nests where they’ve laid eggs for the next generation of their species.

If you care for nest boxes in your garden be sure to take appropriate steps to bring your bees indoors and clean their cocoons. Check out the Linn Master Gardener Association Bee Notes email list to receive timely emails about the seasonal steps of caring for mason bees.

When solitary adult bees finish reproducing and nest building, their work is done, so they die off. But small carpenter bees, from the genus Ceratina, are an exception. Ceratina females remain as late into the cold season as they can muster in order to guard their nests.¹ These protective mothers fend off predators, pests and parasitoids that try to invade the nests.

*Ceratina acantha* © vespidmacro, some rights reserved (CC-BY-NC)

This fall, we hope you are able to see some of the last glimpses of bees of the year!

This post concludes our series on what the bees are doing right now! Thank you for taking part in this seasonal journey through the lives of bees in the Willamette Valley.

Source Cited:

1: Danforth, B. N., Minckley, R. L., & Neff, J. L. (2019). The solitary bees: Biology, evolution, conservation. Princeton University Press.

The Underappreciated Syrphid Fly

Posted on August 23, 2022 by Devon Johnson

A syrphid flying over a clarkia, photo by Devon Johnson

We have been seeing syrphid flies (family: Syrphidae) in great abundance this summer over at the Garden Ecology lab’s research garden, so much so, that our field research team has begun to call it the year of the syrphids! These bee-mimicking, skittish pollinators have particularly loved the native and cultivar yarrow we have planted in our plots. Although their abundance has recently dipped–likely because Yarrow (Achillea millefolium) is done with its first round of bloom–we still see them buzzing around.

Syrphid flies, also known as flower flies or hover flies are a common visitor of gardens. You may see them buzzing around bright flowers or fighting mid air. They are important pollinators and feed off of nectar and pollen in their adult stage. Additionally, in their larval form, they are great at reducing aphid populations, but are extremely susceptible to pesticides.

Line drawing of *Toxomerus* spp. life cycle, credit to Brett Blaauw, Department of Entomology, Michigan State University

The life cycle¹ of syrphids start with the adults laying eggs in leaves of infested plants. After about three days, they hatch into their voracious, blind, larval stage.

The larvae feast on small pests like aphids, leafhoppers, scales, and thrips. The larvae do this by moving along plants, lifting their heads to try and seize and pierce their prey with their triple-pointed dart inside their mouth². After slurping their prey dry, they will discard the exoskeleton.

Larvae will develop through a few instars and after 1 to 3 weeks will go into a pupal stage on the host plant or on the soil. After two weeks, an adult emerges.

Syrphid larvae with an aphid in its grasp. Photo by Oregon State University

Hover fly pupa. Attribution © Adam Grimwade, all rights reserved⁵

In the pacific northwest, our common syrphid is Scaeva pyrastri. It is unique in that rather than overwintering as a larvae, S. Pyrastri overwinters as an adult. Three to seven generations occur in a year, with possibility for the higher counts depending on the region and species. Another species, originally native to Europe, the drone fly (Eristalis tenax³) is named after male honey bees because it is mimics them so well. Other mimics in Syrphidae lay their eggs in the nests of bumblebees or social wasps, where the larvae eat dead bees and detritus.

Their quick movements and bee-like appearance can make syrphid flies hard to identify.

To identify a flying insect as a syrphid, look for a single pair of wings. Flies (Order: diptera) do not have a second pair of wings like bees. Instead they have a vestige of hind wings called halteres that look like little nubs beneath their wings. These act like gyroscopes to help the fly balance during unique in-flight maneuvers. Also look for large, forward facing compound eyes typical of any dipterans. In our lab, we’ve see a wide range of size and different colors. Syrphids can be anywhere from a tenth of an inch to half an inch long, and have black or brown bodies with white or yellow spots and stripes. Fun fact: most hover fly mouths are extendable ‘sponges’ that mop up nectar and pollen.

Common oblique syrphid (*Allograpta obliqu*a). Notice the nub-like halteres below the wings. Photo by Ron Hemberger

Flower flies are extremely important to pest control and pollination, 40% of syrphid species larvae feast on the previously mentioned prey, and each larvae can eat up to 400 aphids during development!

Unfortunately, the larvae of syrphids are similar to many other species so are hard to identify. However, they are usually on pest infested plants and may be seen near adult syrphids. Look for their typical ‘stretching’ behavior while they are on the hunt. If you have a pest problem, avoid using pesticides or insecticides! These kill the syrphids that can help with pests. Instead, promoting syrphids or other pest eaters like ladybugs and lacewings by providing a variety of insectary plants can help you in the long run.

A large syrphid on our native yarrow, with a threat nearby! Photo by Devon Johnson

As previously mentioned, yarrow (Achillea millefolium) has been our most successful syrphid-attracting plant in our lab this year. Syrphid flower preference varies based on the subfamily, according to studies. The subfamily Eristalinae is attracted to white flowers, Pipizinae prefer white and yellow, and Syrphinae is more general. Link to an article going more in depth on syrphid flower preference here⁴.

Not coincidentally, native yarrow is primarily white, while our cultivars are yellow and pink. Observationally, syrphids visit yellow yarrow at a similar rate as they do the native, while our pink cultivar saw next to no syrphid visitors. We recommend planting yarrow as well as a variety of native flowering plants to support these pollinators. Leave leaf litter and debris around flowering plants, too. These provide protected overwintering sites which syrphids rely on⁷.

Syrphid on our yarrow ‘Moonshine’ cultivar. Photo by Devon Johnson

Currently, no syrphid species are on the U.S. Endangered Species Act lists, but like many insects, this underappreciated pollinator is understudied and biodiversity of this group is not well tracked. In Britain, however, some hoverflies have been placed on their Biodiversity Action Plan.⁶

Whether syrphids are endangered or not, we can help biodiversity by promoting native pollinators and planting native plants in our yards and gardens.

Credits

New Summer Game- Pollinator Bingo!

Posted on August 10, 2022 by Svea Bruslind

We are entering the heart of summer, with blue skies, rising temperatures, blooming flowers, and growing gardens. As some of us are taking this time to relax in the bounty of our gardens and in whatever shade we can find, our pollinator counterparts are in the middle of their busiest season. The pollinators are out in full force, and it seems almost impossible to turn around in a garden without spotting a new butterfly, bee, or beetle. So for those among us who want to engage even further with the friends visiting our gardens around this time of year, we have the perfect game for you: Pollinator Bingo!

Our Pollinator Bingo-or should we say BEEngo- is a healthy mix between Bingo and a scavenger hunt!

Here’s how to play:

Select the Bingo Card you will use
Download it, or print it out, and get it ready to be filled out
Keep your eyes open for these visitors in a garden. When you spot a pollinator on your Bingo card, mark that pollinators square.
Once you fill an entire row (horizontal, vertical or diagonal) you’ve won your BEEngo!
Extra Credit Challenge: Try to black out the entire card!

We hope you have fun playing Pollinator Bingo outside, exploring and enjoying the natural world in some way. Good luck BEEngo players!

Pollinator Bingo Board 1 Download

Pollinator Bingo Board 2 Download

Below, we included some pollinator spotlights, so you can get to know some of the species on your Bingo card a little better!

Pollinator Bingo Spotlight List:

Tribe Eucerini, Longhorned bee

Eucerini, also known as long-horned bees, are favorites among our lab members. They are the most diverse tribe in the family Apidae, with over 32 genera. These bees are solitary and ground-nesting. What makes them distinct and a lab favorite are the long antennae the males are known for and from which they get their common name. The females are also recognizable, as they have long hairs, known as scopae, on their hind legs, giving them the appearance of wearing very thick pants.

2. Species Papilio machaon oregonia, Oregon Swallowtail butterfly

As with any in the Swallowtail family, Papilio machaon oregonia, or the Oregon Swallowtail, is big, beautiful, and eye-catching. It was officially named Oregon’s state insect on July 16, 1979. It is native to the northwest and is only found in Oregon, Washington, Idaho, and sections of British Columbia. For the purposes of Pollinator Bingo, any Swallowtail will count for its space. Keep an eye out for the Oregon Swallowtail and others, and see how many different species you can find!

3. Family Syrphidae, Flower Fly

Hoverflies, flower flies, and syrphid flies are all different names for the flies within the family Syrphidae. Syrphid flies come in a wide variety of sizes and colors, with some that resemble wasps and others that look nearly identical to bees. Most syrphids, however, can be found with some kind of striping on their abdomen. Syrphids are essential to any garden as they help with pest control and pollination. Some people are surprised that flies are pollinators too, but hopefully, this list can illustrate the wide variety of pollinators out there!

4. Species Trichodes ornatus, Ornate Checkered beetle

Trichodes ornatus, or the Ornate Checkered beetle, is an interesting species, as during the early stages of its life, instead of pollinating, it feeds on pollinators. These beetles will lay their eggs on plants such as yarrow, sagebrush, and asters. When these eggs hatch, the larvae attach themselves to a visiting bee, usually a leafcutter bee. They will then be transported to the bee’s nest, where they will eat the provisions left there for the host larvae before eating the host larvae and burrowing into nearby cells to do the same. As an adult, the Ornate Checkered beetle will feed on pollen but will not miss an opportunity to snack on other visiting pollinators when foraging for pollen.

Attribution © LapisOre some rights reserved (CC by lapis_the_mothman iNaturalist user)

5. Species Calypte Anna, Anna’s hummingbird

Calypte Anna or Anna’s hummingbird should be a familiar sight for many of us. This rambunctious bird is a permanent resident along the Pacific Coast, staying year-round through winters instead of engaging in migration as other species of hummingbirds are known to do. Males of Anna’s hummingbird are pretty talkative, often vocalizing with a buzzy song. The males have a brilliant red head with a green body, and the females have similar green plumage, but without the red coloration on their face and neck.

Attribution © selwynq some rights reserved (CC by selwynq iNaturalist user)

What are bees doing right now? Summer Edition

Posted on July 25, 2022 by Mallory Mead

Summer is the main active season for many bee species. After a wet spring in Western Oregon, the sun is out and our world is in bloom!

So what are summer bees up to right now? The main events of the season are…

Foraging for nectar and pollen
Finding mates and laying eggs
Excavating, finding and building nests for offspring.

Adult bees also experience predation by spiders and birds during this time. This Crab Spider caught a female long horned bee in its jaws!

A female long horned bee caught by a crab spider on Douglas’ Aster.

So who exactly is out and about in your garden at this time of year?

Bumblebees and honeybees visibly dominate the landscape throughout the summer, but lean in closer to your flowering plants and you’ll find the smaller sweat bees (family: Halictidae), long horned bees (genera: Melissodes and Eucera), leafcutter bees (genus: Megachile) and small carpenter bees (genus: Ceratina). Although there are many others amid the vast diversity of bee species science is only beginning to understand, these are some common garden visitors. We’ll go through each group and their summer activities.

Notice the two adomenal segments beneath the yellow stripe of this male yellow-faced bumblebee (Bombus vosnesenskii). Photo by Jen Hayes.

The presence of pollen on a bee especially carried in pollen baskets, is a good indicator that the bee is a female. Photo by Jay Stiller-Freeman

Bumblebees: By summertime, most queens have established colonies of workers who do the foraging for the hive, so we see less large queen bumblebees and more smaller workers as the season progresses. Later in the season, queens lay male eggs as well as eggs for the next generation of queens. Male bumblebees take to the landscape in mid to later summer, recognizable by their additional segments on their abdomen, long antennae, and by the fact that they don’t carry pollen like females do. Males do not have stingers, so if you can confidently identify male bumblebees, they are fun to play with while they’re waiting around for new queens with which to mate. You’ll find them sipping on nectar-rich plants like lavender, herbs, asters and heal-all.

Honeybees: Summer is prime time for honeybees! Worker populations are at their peaks; pollen and nectar are flowing. As hive population size rises and available hive space remains static, honeybees may organize a swarm. In this process, the current queen lays new queen eggs and part of the colony joins her to lift off and leave the colony in search of a new cavity to make their home. Swarming is considered a form of colony-level reproduction supporting the idea that honey bee colonies are super organisms. Swarming is common in spring and early summer. Beekeepers add new boxes to hives so prevent their colonies from swarming.

Late summer is mating season for honey bees. Males and new queen eggs are laid and emerge to mate with individuals from other colonies. Honeybees mate in the air at heights ranging between 15 and 60 m¹.

A yellow-faced bumble bee and a honey bee sip nectar from lavender. Photo by Devon Johnson.

Sweat bees

Sweat bee on California Poppy ‘White’. Photo by Tyler Sato Spofford.

A halictid dear to our hearts at the Garden Ecology Lab is the metallic green bee (genus: Agapostemon). While females provision nests in the soil, you can find males resting in congregations on flowers in the evening time and early morning!

Sweat bees are one of the most common groups of “small” bees you’ll find in your garden. They forage on a wide variety of plants and come in a wide range of sizes, but most have striped abdomens, and all carry pollen on their hind legs and nest in soil.

Agapostemon virescens male congregation.

A male long horned bee from the genus Eucera on a California Poppy ‘Purple Gleam’. Photo by Jen Hayes.

Long Horned bees

Long horned bees are most active on our research plots in the mid to late summer. I love this group because they are so easy to recognize. Males have antennae that are way longer than other bees’ relative to their bodies. The females, who bear antenna of normal lengths, are still easy to spot because they have long feathery scopa (or hairs) on their hind legs for collecting pollen that they absolutely pack with pollen while foraging.

Long horned bees are sometimes referred to as “sunflower bees” for their love of foraging on sunflowers.

Long horned bees nest in the soil², so when you see them take it as a reminder to leave some uncovered, undisturbed soil in your garden for these bees to persist!

Notice this female long horn’s feathery pants! Photo by Mallory Mead.

A relatively large small carpenter bee. Photo by Mallory Mead.

Small Carpenter bees

When I point out small carpenter bees (genus: Ceratina), most of my friends can’t believe they are bees. They think they are some kind of flying ant. Their bodies are sleek, and often shimmer with a green or blue reflective gleam.

Small carpenter bees are considered wood excavators as they dig out the pith from dry plant canes for their nests. Ceratina are a unique group in terms of their parenting style. Unlike other solitary bee mothers, Ceratina mothers guard their offspring even after their offspring have developed into adults. Mothers stick around as long as they can until Winter falls.²

Leafcutter bees

Leafcutter bees (genus: Megachile), as their names suggest cut leaves from their host plants! They use these bits of leaves to line their ground and cavity nests, to waterproof and protect their offspring.

Leafcutter bees are from the bee family Megachilidae, a family known for creative nest building. Bees in this family were supposedly able to expand their ranges due to their flexibility in nesting site and material. They’ve been found nesting in wood, porous stones, stems, galls, and even snail shells filling these various cavities with leaves, mud, plant resins, pebbles, straw and even petals². The fascinating nest building behavior we’ve gotten to witness in the field is petal cutting of Farewell-to-Spring (Clarkia amoena) blooms.

We can track the usage of Farewell-to-Spring petals by leafcutter bees due to the signature crescent shape left behind on the flowers.

Thank you for joining us on this exploration of some of Oregon’s summer bees and what they are currently doing! We will release one more blog post in this series. Be sure to subscribe so you don’t miss the next in the series!

Sources

1: Landscape Analysis of Drone Congregation Areas of the Honey Bee, Apis mellifera by Galindo-Cardona et. al, 2012. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3635128/

2: The Solitary Bees by Bryan N. Danforth, Robert L. Minckley, and John L. Neff. 2019.

Pollinator Week 2022

Posted on June 23, 2022 by Jen Hayes

Happy pollinator week and first official week of summer! ☀️🐝🦋

Pollinator week is an annual celebration in June to emphasize the importance of pollinators and their health, started by the Pollinator Partnership. To celebrate pollinator week, we’re going to share some information with you about a few of our favorite pollinators and a few others deserving recognition. June is also Pride Month, so we are going to start with a fun fact connecting pollinators and Pride! 🌈

Did you know there are pollinators named after drag queens? A new genus of soldier flies were discovered in Australia 2020 and given names that are indicative of their metallic and rainbow-colored bodies! Among Opaluma fabulosa, O. iridescens, O. opulens, O. sapphira and O. unicornis are O. rupaul, named after the drag queen RuPaul, and O. ednae, named after the Australian drag queen Dame Edna.

Soldier flies belong to the Stratiomyidae family, which include many flower-visiting flies! Many adult soldier flies visit flowers for nectar and subsequently transfer pollen on their bodies as they travel from one bloom to the next. Six of these seven Opaluma species were impacted by the Australian bushfires in 2019 and 2020; their recent taxonomic identification will allow them to be monitored in recovery efforts following the fires. The full citation for these stunning soldier flies can be found here.

To stay on the theme of iridescence, next we will share some information about my (Jen’s) favorite pollinators: Orchid bees! Orchid bees are in the same family as bumblebees and honey bees (Apidae) but are found within their own tribe, Euglossini. Within Euglossini, there are only five genera: Algae, Euglossa, Eulaema, Eufriesa, and Exaraete. Only one species of orchid bee is found in the United States (Euglossa dilemma), with the majority being found in Central and South America.

Not all orchid bees are iridescent– bees from the genus Eulaema are the exception, which are more similar in appearance to bumblebees than they are to the metallic members of Euglossini. I find orchid bees to be mesmerizing, not only because of their novel color forms, but also their unique adaptations. Some orchid bees’ tongues (proboscises) are more than 1.5 times their body length in order to access nectar located in long, tubular flowers! These bees often fly with their proboscis tucked under their body, and it may look like a small tail as it trails past their abdomen.

Photo © sixlegs on iNaturalist,
all rights reserved.

Euglossa have highly modified tibias on their hind legs. Male members of Euglossa species have a “pouch” on their tibia, used to collect and store floral fragrances from flowers in the form of essential oils. These oils are later used to attract potential mates. I like to think Euglossine males would be excellent candle makers.

Mallory’s favorite pollinators are long-horned bees, in particular those from the genus Melissodes, which are highly abundant in the latter half of our field season! Mallory loves long-horned bees because they have many traits that make them easily identifiable in the field. Males have elongated antennal segments which are indicative of their common name ‘long-horned’. They often have interesting colored eyes as well- some of the specimens we collect have green, blue or grayish eyes that contrast greatly with their often blond-colored hair (scopa). Her favorite trait, however, is the scopa on their hind legs. When full of pollen, long-horned females often look like they have ‘pollen pants’ on, in contrast to the neat and tidy pollen baskets seen on bumblebees! Svea thinks their pollen pants make long-horned bees look like they’re wearing a pair of western-style chaps. Melissodes primarily pollinate species from the Asteraceae, with specialization occurring on asters, daisies, and sunflowers. Sometimes Melissodes are called ‘sunflower bees’.

*Melissodes sp.* visiting a cosmo, photo by Mallory Mead.

Photo © armadillocommander on iNaturalist, some rights reserved (CC BY-NC).

Svea’s favorite pollinator is Anna’s hummingbird (Calpyte anna). C. anna is one of seven hummingbird species native to Oregon. Svea enjoys watching Anna’s hummingbird as a pastime at her parents’ house: they have a small, active community of hummingbirds that are very vocal and can be seen fighting over their nectar sources (including their butterfly bush and hummingbird feeder).

Svea also mentioned that the males are particularly pretty, though it requires a particular angle of light to make their iridescent copper-red colored throats glow. The ‘Anna’ in Anna’s hummingbird comes from the French Duchess of Rivoli, Anna Masséna, who was part of the court of France’s last empress (Eugénie de Montijo, 1853-1870). Anna’s hummingbirds are important pollinators in California, where they feed from coastal chaparral flora that share a similar phenology (breeding and feeding patterns) with the pollinator.

Nicole is another member of the lab whose favorite pollinator is a hummingbird! Nicole’s favorite pollinator is the Rufous hummingbird Selasphorus rufus. The USDA Forest Service describes the Rufous hummingbird as “small but feisty long-distance migrant[s]”. They are small in size and feisty in their protection of their feeding territories, they have been known to chase off other hummingbirds, large insects, and even people! Some of their preferred host plants include morning glory (Ipomoea arborescens), ocotillo (Foquieria spp.), shrimp plant (Justicia spp.) and red-colored blooms from the mint family, such as Salvia elegans and Stachys coccinea. Nicole loves the Rufous hummingbird because she regularly saw them while she was growing up. They could regularly be seen foraging and defending their territory in her parent’s yard.

Photo © Wendy Feltham (wendy5 on iNaturalist), all rights reserved.

Cara’s favorite pollinator is the Western Tiger Swallowtail Papilio rutulus. This magnificent butterfly can be commonly found at Cara’s research plantings of butterfly bush (Buddleja spp.), and can also be spotted basking on yarrow or slowly fluttering along the hedgerows at Oak Creek Center for Urban Horticulture. Despite the name ‘butterfly bush’, Cara has found butterflies to be infrequent visitors of Buddleja, though of the few butterfly visitors they receive, the Western Tiger Swallowtail is the most common. Cara additionally grew up seeing swallowtails every summer, which is why they are her favorite pollinator! To read more about this swallowtail, check out Lucas’s Pollinator of the Week Post.

Let us know who your favorite pollinators are!

No Mow May

Posted on April 26, 2022 by Jen Hayes

Cartoon: Seppo Leinonen, www.seppo.net/e/

A short story about grass

Lawns are perhaps one of the most controversial spaces when it comes to improving landscapes for wildlife. When I was in college, I threw myself head first into becoming more “green”, which for me meant being the best environmental and eco-friendly entomologist I could be. That meant changing not only my own habits, but those of my parents who, fortunately for me and maybe less fortunately for them, lived only thirty minutes away from my university.

It started with composting. After we got over the discussion about how to properly care for an indoor bin to avoid fruit flies AND my mom saw how much deliciously rich soil her dear friend yielded from her own bin, composting was a hit. My mom still tells me how amazed she is by how quickly the pile reduces every spring. I’m still surprised as to how easy of a practice it was for them to adopt.

The topics that came next were bees, buying local, what organic means, reusable everything, why you should check the insulation on the house before even thinking about buying solar panels, and then, after I took two landscape design courses, we approached the topic of grass. For this talk, which actually spanned months, I came prepared with books, quotations, and 3 or 4 finely detailed maps with elaborate plans for turning my parent’s yard into a pollinator sanctuary.

I began with dropping hints that this talk was coming. I would casually add “lawns should be like area rugs, not wall to wall carpeting” into a conversation, or post graphics like the one at the beginning of this blog on Facebook, and tag my parents in it. I even gave my dad Noah’s Garden: Restoring the Ecology of our Own Backyards by Sara Stein for Father’s Day. I knew this was a change that would take a lot more time than the compost.

Truthfully, I started with my mom. She’s the outdoor gardener, my dad is the houseplant guy. And, as anyone who has ever been a child knowns, there’s always one parent or guardian you go to first for the more difficult requests. For the most part, my mom was excited to see me become a budding naturalist. Around the house or on hikes I would point out plants I now knew the names of, and together we would assess the basal leaves of new garden growth, trying to figure out what in the world did she plant next to the lupine in the garden last year. When I got my wisdom teeth removed, she and the nurse patiently waited while I explained how to identify the red oak next to the car from other common oaks planted as street trees. I made it my mission to make my mom a budding naturalist, too.

My mom and I putting together a raised garden bed last summer (2021).

When my landscape design class ended, I took my mom on a tour of her property, pointing out all of the potential diversity their landscape could support if they turned it into something beyond grass. I described the changes I recommended, I explained the benefits of the rain gardens, the swales, the terraced lowbush blueberries for the front yard, the beautiful meadow that would grow in the seasonal wet spot in the backyard and enhance the firefly populations we see glowing in the summer. I explained that though the initial transition would take a lot of work, the result would be significantly less maintenance for them, and they would sit atop the ecological design of my dreams. And there would be so much less lawn, err grass for them to mow.

Nearly 10 years later, I am reluctant to report that the quantity of grass covering my parents’ landscape remains relatively similar. The problem with my plan? I went too big. If mom was not ready to completely transform 3.5 acres, then dad certainly would not be either. Though they both appreciated and complemented my thoughtfulness and the rigor behind my design work when I reviewed it with them, my bold idea of turning the yard into a part pick your own blueberry farm and part pollinator paradise certainly scared them from asking my opinion on any further garden projects for a while.

I refused to let this setback alter my new found passion for increasing the value of my childhood home (to wildlife). I continue to share information with my parents, but in small doses rather than in huge design plans. My mom happily adds native plants we pick out together to her gardens and excitedly reports back about the bees she sees visiting them. They’ve added a small planting of mint outside the kitchen to keep the ants at bay, and when it comes to the lawn, they don’t mind leaving the dandelions and other wildflowers (“weeds”) for wildlife to snack on in the spring. And they’re not afraid of asking my advice on new plants or yard projects, though they don’t always utilize it.

Perhaps the most important result of my collegiate mission for Making the Hayes Family Eco-Conscious was helping my parents to see their yard differently, to help them see the potential that exists underneath all of the grass. I hope part two of this blog post might make you do just the same.

Dandelions covering a field in Northern Vermont

No mow May & reimagining our yards

No mow may is an initiative that started in the United Kingdom and has since spread to numerous other countries. To participate is relatively simple: don’t mow your lawn for the month of May. The goals of the initiative include increasing forage for pollinators and other wildlife, and creating awareness about the negative ecological impact of intensively managed lawns.

The practice of reducing mowing to promote diversity is supported by research. A meta-analysis of studies from North America and Europe found that both plant diversity and invertebrate diversity is higher in urban lawns with a lower mowing intensity. This increase in diversity was true regardless of mowing height or frequency, and the authors also found that weeds and invertebrate pests occurred in higher quantities with intensive mowing in many Northern regions.

In terms of surface area, the largest irrigated crop in the United States is lawn. Our idyllic front and backyard monocultures have been cultivated as such to meet the dominant neat and tidy aesthetic. This aesthetic has been so deeply wound into our culture that untidy yards are accused of being a sign of disrespect to one’s neighbors. The impact is such that if you choose to maintain a yard outside of this aesthetic, you have defend yourself against your neighbors with signage.

Courtesy of The Bees Weeds on Etsy
Courtesy of the Xerces Society
Courtesy of the National Wildlife Federation
Courtesy of the Xerces Society

Perhaps some of this discomfort with weedy yards is due to misinformation- common wildflowers like dandelions, goldenrod, and even sneezeweed have poor reputations because they are thought to cause seasonal allergies. Insect-pollinated plants, which all three of these happen to be, actually shed very little pollen into the air. These plants have co-evolved with their insect pollinators, such that insect-collected pollen grains are actually often larger and/or heavier than those of wind-pollinated plants, and as a result, their pollen cannot easily drift into our respiratory tracts. Many tree species and grasses (which we in the Willamette Valley know all too well about) are more likely to be the culprit for seasonal pollen allergens.

Whether it’s the allergens, the HOA, city standards, your landlord, your own personal preference, or societal pressures that encourage you to keep your yard tidy, there are many small ways in which to increase the productivity and diversity in your landscape. One option is No Mow May- committing to the whole month, or even part of it, to increase the availability of flora to early emerging invertebrates. Reducing mowing frequency is another option, or mowing around weeds like hedge nettle, creeping Charlie, heal-all and others that you may find some insects foraging on. Or perhaps you can replace a small section of lawn a native plant garden, or butterfly garden, or plant some giant sunflowers for the birds.

**Left**: Photo by Raquel Gilliland. **Center & Right:** Photos © Saxon Holt / PhotoBotanic.com

I have compiled a few resources related to No Mow May below, in addition to some more “neighborly” ways you can begin changing your own yard’s aesthetic. If you decide to go No Mow May, we’d love to hear about your experience!

“A weed is a flower in the wrong place” – Ian Emberson

Resources

Plantlife: No Mow May
Bee City USA: No Mow May
PennState Extension: Neighborly Natural Landscaping in Residential Areas
Buzzing and Beautiful: Designing Pollinator Gardens with OSU Extension
OSU Extension: Enhancing Urban and Suburban Landscapes to Protect Pollinators
A Tribute To The Monarch Butterfly: How to Turn Your Backyard Into a Butterfly Friendly Habitat
Fine Gardening: Defining the New American Cottage Garden (my personal favorite aesthetic!)
www.healthyyards.org

**Left**: original source unknown. **Right:** Sourced from healthyyards.org

What are bees doing right now? Spring edition

Posted on April 13, 2022 by Mallory Mead

It’s early spring and the trees have begun leafing out. Colorful flowers are springing from the ground, and the landscape is slowly coming to life with insect activity. In this post, I’ll highlight some of Oregon’s ubiquitous spring bees, what they are up to, and how to easily recognize them.

Queen bumblebees are emerging from their winter burrows under leaf litter and forest duff. They zoom by with boisterous buzzes. Queen bumblebees are sturdy and furry, and can power through wind, rain and cold better than any other type of bee. Queens are much bigger than the workers that will come once the queens find nest sites and begin laying eggs. For now, they work alone, preparing to lay their first set of worker eggs.

If you see (or hear) any queen bumblebees this spring as they scan the sparsely blooming landscape, they are most likely looking for a proper nest site, finding nectar to energize this search, or, if one has already found her nest, she may be collecting pollen to feed her developing worker offspring.

A rain-drenched Yellow-faced bumble bee on Oregon Grape. Photo by Jen Hayes.

A female mason bee has brought bright yellow pollen to her nest. Video by Jen Hayes.

Mason bees (Osmia lignaria) are a cherished Oregon spring bee active from March to early June. Look closely in a bee hotel for a chance to observe mason bees in action!

Male mason bees emerge first from their pupal cocoons. You might see them patrolling bee hotels waiting for a female to chase down. When the females emerge a little later, they mate and then begin their work provisioning nests with pollen balls and eggs. An individual female has a short lifespan living only about 20 days, but in this time, she may provision anywhere from 2 to 7 nest holes each containing many offspring cells.¹ Quite the busy bee!

Andrena is a genus of mining bees that are some of the earliest risers when it comes to spring emergence. They are a diverse group of small, furry, ground-nesting bees that are only active for a few weeks out of the year. Andrena are solitary bees, but can be seen foraging and mating in droves on early blooming fruit trees like cherry, apple and pear. Last spring, I watched hundreds swarm this cherry tree to collect nectar and mate.

Andrena in cherry tree (captured with magnifying lens). Photo by Mallory Mead
Andrena mating pair. Photo by Mallory Mead.

Spring Bee Quick ID:

Now, let’s identify some of the bees you may see out and about on sunny spring days when the wind is low. We’ll start with the most conspicuous group – the bumblebees. Bumblebees are the biggest and the loudest bees on the landscape, covered in a thick coat of fuzz. Here’s how to recognize the 3 most common species of bumblebees you’ll see in the Willamette Valley in early spring.

Bombus vosnesenskii or the “yellow-faced bumblebee” is by far the most common bumblebee in this region. It is recognized by the yellow fuzz on its face and yellow band near the distal end of its abdomen.

*B. vosnesenskii* foraging on butterfly bush. Photo by Mallory Mead.

*B. melanopygus* queen foraging on Wartleaf Ceanothus. Photo by Mallory Mead.

Bombus melanopygus, the “black-tailed bumble bee” is another of the earliest Bombus species to emerge. You can identify this bee by the orange band in the middle section of its abdomen!

Bombus mixtus, the “fuzzy-horned bumblebee”, tends to emerge a little later than the previous two species, and has orange hair on its lowest abdominal segments.

*B. mixtus* flies amid borage plant. Photo by Mallory Mead.

Mason bees can be recognized by their deep iridescent blue-green color, that sparkles in the sun. Males are distinguished from females by their small size and the yellow mustaches found on the front of their faces. Females lack the yellow tufts and are larger than the males but smaller than a honey bee. They carry pollen on the underside of their abdomen which is a trait unique to their bee family, Megachilidae.

Andrena are a diverse group that are tricky to identify. They can be distinguished from other small, furry bees by the presence of velvety hairs between their eyes and the middle of their face called “facial fovea”.²

Facial Fovea. Photo from the ODA Bee Guide

They also carry pollen on their hind legs and on hairs between their abdomen and thorax, which distinguish them from bees in the Megachilidae family.

We hope this little guide will help you experience the native bees in your landscape this spring that make the pollen go round.

Thank you for joining us on this exploration of Oregon’s spring bees and what they are currently doing! We will release two more blog posts in this series, one for each of the four seasons. Blogs will be posted during their prospective seasons, so be sure to subscribe so you don’t miss the next in the series!

Garden Ecology Lab

Socio-ecological research in urban and suburban garden systems

Category Archives: Pollinators