metallic green bee
gathering nectar among
pink mallus tassels
The adults gather nectar and pollen to carry back to the nest, which may be burrows in dead wood or the ground. The female lays an egg on a ball of pollen in a cell which she also supplies with nectar. Pollen and nectar will feed the larva until they emerge as adults in the spring.
There are some 45 species of Metallic Green Bee found in the Western hemisphere. It's a bit difficult to tell them apart, but I like to think that the gentle green bees gracing our garden are Agapostemon angelicus.