Biologists U.S. Geological Survey in Maryland are directory of local bee species, as well as plants and insects, with which they interact as part of the scientific program «USGS Native Bee Inventory and Monitoring Program». To get a good picture, scientists sometimes have to do 30 to 300 frames. Biologists have shared their archive of 1200 photos, and in this set are just a few of them.

Horsefly species Tabanus atratus in Upper Marlboro, Maryland.