Suckley’s Cuckoo Bumble Bee is a medium-sized bumble bee with a black head. The upper segment of the hind leg has a convex, densely hairy outer surface and lacks a pollen basket. Suckley’s Cuckoo Bumble Bee looks similar to the Gypsy Cuckoo Bumble Bee, but its thorax is mostly yellow on the sides. There are prominent triangular ridges on the underside of the last segment of the abdomen.
Length: Females, 1.5 to 2.5 cm (0.59 to 0.98 in); Males, 1.5 to 2.2 cm (0.59 to 0.87 in)
Check out the Field Guide to Bumble Bees of the Northwest Territories.