Two-ranked Bumble Bee
Very surprised to find a Two-ranked Bumble Bee (Bombus bifarius) on the escarpment slowly enjoying the Sticky Goldenrod (Solidago spathulata ssp. glutinosa) at Whooping Crane Summer Range, Wood Buffalo National Park, Northwest Territories, Canada. Ramsar site no. 240.
''Bombus bifarius'', the two-form bumblebee, is a common species of eusocial bumblebee of the subgenus ''Pyrobombus''. ''B. bifarius'' inhabits mountainous regions of western North America. Its common name refers to the two dominant color polymorphisms, the nominate and nearcticus polymorphisms, present in the species. ''B. bifarius'' has been identified as one of the two species of bumblebee observed to use pheromones in kin recognition. The other is the frigid bumblebee, ''Bombus frigidus''.