These burrowing bees, in the genus Andrena, were apparently overwintering in a home in Valley Springs, California. The customer called, and gave us a baggie with 10 of the burrowing bees. The specimens were collected approximately March 3, 2016 and given to our technician, Jason Price.
The bees were showing up in the bottom track of an upstairs window, every time the sun hit the window. The window faces south-east.
Burrowing bees get their name from burrowing in the ground.
Click on an image to enlarge it.
Foothill-Sierra Pest Control was faced with excluding a large population of pigeons roosting between two historic buildings in downtown Sonora. We did not want to risk piercing the walls or roofs of these buildings. The first prototype, created and built by Jim Tassano, with Kraig Stewart’s help, worked well. The job was then taken up by our vertebrate specialist, David Adragna, who designed and built, with Bill Breidenstein, a strong, long-lasting, modular version of the prototype.
No hardware penetrated the roof or walls of either building.
The pigeons have moved on, and the flies are gone.