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Two-form Bumble Bee Complex
Plate 1 of 9. (c) Andrew DuBois, some rights reserved (CC BY-NC-ND), uploaded by Andrew DuBois · via iNaturalist

Two-form Bumble Bee Complex

Bombus bifarius

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 morphs, 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.

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2 branches of this group, most-observed first

Vancouver Bumble Bee

speciesBombus vancouverensis

Colorado Black-notched Bumble Bee

speciesBombus bifarius

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Where it lives

Recorded sightings

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geo-referenced records in GBIF, from museums, herbaria and field observers.

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Every page naming Bombus bifarius in the Biodiversity Heritage Library →

This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 1124207.