Male Colletes usually have triangular faces with dense white hair. Found from late spring to fall throughout most of California, but they are not particularly common in gardens. Photo by Rollin Coville.
Female Halictus farinosus are the largest of sweat bees. This one is gathering pollen from a California poppy. Found during spring to fall throughout most of California nesting in small groups in soil. Photo by Rollin Coville.
Female Osmia atrocyanea nest in tunnels in wood. Seen in spring, mostly in the foothills of the Sierra Nevada, Coast and Transverse Ranges. Photo by Rollin Coville.