Bombus fernaldae is a species of cuckoo bumblebee.
The Fernald cuckoo bumble bee is a cuckoo bumble bee, having only males and queens and no worker bees. The females place there eggs in the nest of the confusing bumble bee, Bombus perplexus, and the red-belted bumble bee, Bombus rufocinctus who raise the larvae. Fernald cuckoo bumble bees pollinate Potentilla

Potentilla

Potentilla is the genus of typical cinquefoils, containing about 500 species of annual, biennial and perennial herbs in the rose family Rosaceae. They are generally Holarctic in distribution, though some may even be found in montane biomes of the New Guinea Highlands...

, Rubus, clovers, and goldenrods.