- Author: Kathy Keatley Garvey
It's National Pollinator Month, and what better time to find a tiny speck of a bee on a seven-foot tower of jewels, Echium wildpretii?
This is a sweat bee of the family Halictidae, the second largest family of bees, comprised of some 4500 species. The family is found on every continent except Antarctica.
Sweat bees--as the name suggests--are attracted to perspiration. The oldest fossil record dates back to the Early Eocene epoch, which lasted from about 56 to 33.9 million years ago.
A tiny speck of a bee finding a tiny bit of pollen, much as it did millions of years ago...
![A sweat bee, possibly Halictus tripartitus, foraging on pollen on a tower of jewels, Echium wildpretii, in a Vacaville garden. (Photo by Kathy Keatley Garvey) A sweat bee, possibly Halictus tripartitus, foraging on pollen on a tower of jewels, Echium wildpretii, in a Vacaville garden. (Photo by Kathy Keatley Garvey)](https://ucanr.edu/blogs/bugsquad/blogfiles/107269.jpg)
- Author: Kathy Keatley Garvey
In the sweltering heat of Solano County (100 degrees) during National Pollinator Month, how about an image of a sweat bee, genus Halictus, a tiny bee that's often overlooked in the world of pollinators.
It's a social bee that nests in the soil. "These nests consist of a complex of tunnels with individual brood chambers," according to California Bees and Blooms: A Guide for Gardeners and Naturalists (Heyday), the work of UC-affiliated scientists,
My camera caught this Halictus flying over Coreopsis in our Vacaville pollinator garden on June 5.
Camera: Nikon Z8 with a 50mm lens
Settings: Shutter speed, 1/4000 of a second; f-stop, 5; ISO 500.
UC Davis distinguished professor emerita Lynn Kimsey, emeritus director of the Bohart Museum of Entomology, and Bohart Museum scientist Sandy Shanks said the species appears to be Halictus ligatus.
Most Halictus species are generalist foragers, according to the Great Sunflower Project. "They use all sorts of genera of plants from the Asteraceae to Scrophulariaceae. They are very common on composites (daisy-like disc and ray flowers) in summer and fall."
We've seen them on everything from mustard to milkweeds to catmint to rock purslane, from spring to fall. They also appear regularly on the tower of jewels (Echium wildpretii).
Not to mention the Coreopsis.
/span>![A sweat bee, genus Halictus, sailing over a Coreopsis in a Vacaville pollinator garden. June is National Pollinator Month. (Photo by Kathy Keatley Garvey) A sweat bee, genus Halictus, sailing over a Coreopsis in a Vacaville pollinator garden. June is National Pollinator Month. (Photo by Kathy Keatley Garvey)](https://ucanr.edu/blogs/bugsquad/blogfiles/107169.jpg)