Now combined with another species, the cuckoo bumble bee Bombus flavidus, is the most broadly distributed bumble bee species of any kind in the world.
Red-tailed cuckoo bumblebee - Bumblebee Conservation Trust
COSEWIC Assessment and Status Report on the Gypsy Cuckoo Bumble Bee (Bombus bohemicus) in Canada - 2014
Field Entomologist to Industry Rep: One Entomologist's Unique
Indiscriminate Cuckoo Bumble Bee - Montana Field Guide
Cuckoo Combo: Re-Classification Makes Bombus flavidus World's Most Widespread Bumble Bee
Wi BBB: Bombus flavidus
Little Organisms, Big World: Insect Gut Bacteria Partnerships
Bombus fernaldae - Wikipedia
Diversification Pattern of the Widespread Holarctic Cuckoo Bumble Bee, Bombus flavidus (Hymenoptera: Apidae): The East Side Story
Fernald cuckoo bumble, Bombus flavidus/fernaldae - Bumble Bees of Washington State Bumble Bees of Washington State
Wi BBB: Bombus flavidus
Cuckoo bumblebee species - Bumblebee Conservation Trust
COSEWIC Assessment and Status Report on the Gypsy Cuckoo Bumble Bee (Bombus bohemicus) in Canada - 2014
The Society for Conservation Biology
Building a Strong Community: A Key Step in Entomology Student Life