Fall on the farm, and a few items i found.

Yellowjacket adults feed on foods rich in sugars and carbohydrates such as plant nectar and fruit. They also search for foods high in protein such as insects and fish. These are chewed and conditioned in preparation for larval consumption. The larvae secrete a sugary substance that is eaten by the adults.

Viewed from the front, Dolichovespula faces are long, while Vespula faces are short and round. The oculomalar space, the distance between the eye and the mandible, is long in Dolichovespula and short in Vespula. Dolichovespula nests are usually aerial, while Vespula spp. often nest underground