Pure Green Augochlora
These bees are referred to as "sweat bees" because they like to lick sweat from human skin, most likely seeking salt. Electrolytes such as sodium are important for nerve and muscle function, in addition to a variety of other life processes. So, it appears that sweat bees imbibe human sweat in order to help them maintain homeostasis. Interestingly, as you can see in these photos, these bees are cobbling their nests together using galleries in the wood that were probably made by other insects. Within these galleries, the female bees will leave cakes made of pollen, nectar, and spit, which will soon be food for her offspring. It's thought that her saliva is added to the cakes because it has antiseptic qualities that help keep the food fresh and add extra protection to the eggs. After a brief interlude with a mate, she will lay eggs on the pollen/nectar balls. The nests are lined with a thin, impermeable membrane that she produces from glands in her body. The nests need this added protection because there are many predators that would gladly devour her offspring. When the larvae hatch, they consume the nutritious cakes. Once larval development is complete, they will pupate, and then emerge later as adults.
''Augochlora pura'' is a solitary sweat bee found primarily in the Eastern United States. It is known for its bright green color and its tendency to forage on a variety of plants. Inhabiting rotting logs, this bee can produce up to three generations per year. Both males and females have been observed licking sweat from human skin, most likely seeking salt