Two-form bumblebee

Description:

Bombus bifarius has a relatively small body size ranging from 8 to 14 mm (0.31 to 0.55 in) for workers and 15–19 mm (0.59–0.75 in) for queens, with short, even hair covering their bodies.[5] B. bifarius individuals express multiple color polymorphisms; however, many similarities exist between these color variants.[5] Hair on the faces of B. bifarius individuals is usually yellow or white in color and sometimes exhibits black coloration on the top of the head.[5] In at least the lowermost third of the thorax, there is also black coloration.[5] The hindlegs and pollen baskets can be a brownish-orange or black, depending on whether metasomal tergite (abdominal segment) 3 is black or not.[5] In the nominate color variant, metasomal tergites 2 and 3 are red, while in the nearcticus color variant, metasomal tergites 2 and 3 are black.-Wikipedia.

Habitat:

Spotted in backyard.