Bombus sonorus

Bombus sonorus, commonly known as the Sonoran bumble bee, is a species of bumble bee in the family Apidae. It is found in Mexico and southwestern North America. Although it has often been categorized as a subspecies of Bombus pensylvanicus, it is has since been shown to not hybridize with B. pensylvanicus over a broad area of geographic overlap, confirming its status as a distinct species.