- Author: Kathy Keatley Garvey
Ever seen a green metallic sweat bee?
The colors are exquisite.
This is a female Agapostemon on a purple coneflower at UC Davis. They are called "sweat bees" because they are attracted to human perspiration.
The genders are easy to distinguish. The males have a striped abdomen.
Green sweat bees are among the bees featured in the book, "California Bees and Blooms: A Guide for Gardeners and Naturalists," co-authored by the University of California team of Gordon Frankie, UC Berkeley; Robbin Thorp (1933-2019) UC Davis; and UC Berkeley affiliates Rollin Coville (photographer and entomologist) and Barbara Ertter (plant specialist). Frankie, Thorp, Coville and Ertter (and others) also published "Native Bees Are a Rich Natural Resource in Urban California Gardens" in California Agriculture.
Oh, those bee-utiful bees. They are not only conspicuous, but charming and often camera-cooperative.
- Author: Kathy Keatley Garvey
On St. Patrick's Day, we see green. We crave green. We wear green.
And the penalty for not wearing green? You get pinched.
Not so with green sweat bees. As their common name implies, they're green. A metallic green. But no pinching allowed!
The green sweat bee, Agapostemon spp., is an unforgettable bee. The females are metallic green, from head to thorax to abdomen. The males, however, are "half green"; they have green heads and thoraxes, but yellow-and-black striped abdomens.
In California, Agapostemon texanus is widespread and common, according to the authors of the card set, Common Bees in California Gardens, published by the University of California Agriculture and Nature Resources. It's the work of UC Berkeley and UC Davis entomologists, including Robbin Thorp, distinguished emeritus professor of entomology, UC Davis Department of Entomolgy and Nematology. It's a companion to the book, California Bees and Blooms: A Guide for Gardeners and Naturalists.
The card set, illustrated with photos and filled with facts, features 24 bees. This will give you a head start in identifying California's 1600 species of native bees--and inspire you to learn more.
Meanwhile you can learn about the distribution, flight season, nesting habits, floral hosts and how each bee species transports pollen.
How to order: You can order online ($15 per book) on this website, http://anrcatalog.ucanr.edu/Details.aspx?itemNo=3552
Meanwhile, keep a lookout for green sweat bees. Their flight season is from March into October, but their peak flight activity occurs from May into September. We've seen them on Cosmos and Rudbeckia (sunflower family) and Erigeron (daisy family).
Not on St. Patrick's Day, though.
