The month of May in my North American Native Bee Calendar purchased from the Great Sunflower Project, features the Green Bee – Ultra Green Sweat Bee to be exact, genus Agapostemon. They emerge in early spring through summer and nest in the ground.
Green bees are small and slender. Females are entirely bright green. The males have a bright green thorax and yellow and black striped abdomen. They mate in late summer, early fall and the pregnant females hibernate over the winter. They then begin a new nest in spring for their young.
You might spot a green bee in your garden if you grow the following: grindelia (gumweed), erigeron (fleabane), coreopsis (tickseed), and cosmos.
An update on my mason bee house. You can see the holes are filling up and plugged with mud.