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Protect Our Pollinators

Bee Watch—Catch The Drama In Your Backyard!

5/12/2021

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Written by Phyllis Stiles
​



​A mama mason bee often enters her nest head first, flips at the end of the cavity (like a swimmer at the end of the pool) to unload her pollen from her belly, and then exits the nest cavity head first. When she's supplied enough pollen to feed one baby, she will lay an egg on top of it, and close the cell with clay. The next spring, her offspring will emerge to repeat the process. Video:  Phyllis Stiles

​When my calendar said March 20, I knew it was the Spring Equinox. But plants and animals, especially pollinators, would feel it in their bones--if they had any bones. As days grow longer and our collective cells experience the sun’s warmth, the sap rises in trees, herbaceous plants find their stems lengthening, leaves form, blossoms unfurl, and seeds sequestered in the dark send out root hairs and reach to the sky with new life.


Like a finely tuned orchestra with each instrument playing its part, species fulfill their destinies. Thanks to dedicated scientists like Jarrod Fowler and Sam Droege and many others, we are learning much more about the bee mothers who won’t collect just any old pollen for their offspring. (On the other hand, they’ll take nectar wherever they can get it.) These pollen specialists make up about one quarter of the world’s 20,000 species of bees. Flower pollen is a bee’s only source of protein. Without it their larvae will not develop into healthy adults.
Picture
Leafcutter bee (mimicking a carpenter bee) on native Blue False Indigo by Marie Henderson
As you wander through your yard or the woods this spring and summer, maybe you can pick out some of the very special bees collecting pollen for their young. Be on the lookout for an unusual black bee about the size of a honey bee when  you see flowers on plants in the coreopsis, sunflower, rudbeckia or goldenrod genera. If you’re lucky, you could see the carpenter-mimic leafcutter bee, Megachile xylocopoides. You’ll know her identity if she transports pollen under her belly rather than on her hind legs, where most bees transport pollen. Her name describes her nesting technique: leafcutter bees chew round disks from leaves to plaster the walls of individual cells for their offspring in small linear cavities. Some of them even wallpaper nests using flower petals. Imagine being a baby wrapped in flower petals!
Redbud trees and blueberry bushes bloom early in the spring which makes Southeastern blueberry bees happy. They are often mistaken for bumble bees, but if you see a mother collecting pollen from redbud or blueberry flowers and, if her pollen is loosely spread around her back legs rather than neatly balled up like pollen on a honey or bumble bee’s back leg, you have probably seen a Southeastern blueberry bee (Habropoda laboriosa). 

Smaller than bumble bees, Osmia virga bees also specialize on blueberry flowers and conveniently clue us in with their blue-green color and no striping on their rounded abdomen. Like leafcutter bees, Osmia bees transport pollen under their bellies. Because these mamas build cells for their young out of clay, they are known as mason bees.
​If you haven’t guessed by now, I may be passionate about bees but not nearly as much as passionflower bees (Anthemurgus passiflorae) love passionflower pollen. Small black passionflower bees are extremely particular about what they feed their babies, only collecting pollen from a single passion flower species, Passiflora lutea, a vine which makes small yellow flowers in our Western North Carolina summer. They are called mining bees because, like 70% of bee species, they excavate tunnels in the ground to raise their young. If you see larger bees on purple passion flowers, they are likely carpenter bees which are favored for pollinating passion fruit fields in Mexico.
Picture
Passionflower bee gathering pollen on Passiflora lutea vine by Kim Bailey
I was taught that you are the company you keep. These specialist bees have really taken that maxim to heart by keeping company with the flowers that will make their babies thrive. Sadly, due to pesticides, climate change, and habitat loss—including the special native plants they rely on to raise the next generation, nearly 60% of pollen specialist bees are considered rare and declining. ​
Asheville GreenWorks’ Bee City USA program is encouraging everyone to choose pesticide-free native plants for their landscapes to sustain as many bee species and other pollinators as possible in our mountains. At more than 500 species, we are proud that North Carolina has the most bee diversity of any Southern state! If you plant their preferred species, they will come, and you need not worry about any of these solitary bees stinging you. They don’t have large nests to defend like honey and bumble bees.

Visit Asheville GreenWorks’ website to download newly updated lists of pollinator-friendly native perennials, shrubs, trees, vines, and grasses along with a list of local sources for each plant. Not only do we live in a botanical garden of Eden, we are lucky to have many nurseries growing and selling native plants without pesticides that would harm pollinators. Join Asheville GreenWorks’ E-News list and like our Facebook page to receive announcements of native plant sales around the region as well as opportunities to plant and certify pollinator gardens.

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Phyllis Stiles is an Asheville GreenWorks board member and founder and director emerita of the national Bee City USA® program.  Bee City USA merged with the Xerces Society for invertebrate Conservation in 2018. Asheville GreenWorks  leads the Bee City USA-Asheville affiliate.
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    Members of the Bee City USA - Asheville Committee contribute to this blog.

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​Asheville GreenWorks is a 501(c)3 non-profit environmental organization, governed by a Board of Directors. Established in 1973, GreenWorks mission is to inspire, equip and mobilize individuals and communities to take care of the places we love to live.
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      • Native Pollinator Plants and Nurseries
      • Pollinator Garden Certification
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