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For Insects, Spiders & Their Kin
For the United States & Canada
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Species Bombus griseocollis - Brown-belted Bumble Bee

Brown-belted Bumble Bee - Bombus griseocollis - female Bee - Bombus griseocollis - female Bumblebee on thistle - Bombus griseocollis - female Bumble Bee - Bombus griseocollis - male Bumble bee - Bombus griseocollis - male bumblebee - Bombus griseocollis - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Apoidea (clade Anthophila) - Bees)
Family Apidae (Cuckoo, Carpenter, Digger, Bumble, and Honey Bees)
Subfamily Apinae (Honey, Bumble, Longhorn, Orchid, and Digger Bees)
Tribe Bombini (Bumble Bees)
Genus Bombus (Bumble Bees)
No Taxon (Subgenus Cullumanobombus)
Species griseocollis (Brown-belted Bumble Bee)
Other Common Names
Often cited as Brownbelted Bumble Bee, but use of a hyphen is generally preferred when citing common names (see AOU and BOU bird checklists).
Synonyms and other taxonomic changes
Bombus griseocollis (DeGeer)
Orig. Comb: Apis griseocollis DeGeer 1773
Syns: Bombus separatus and Bombus mormonorum.
Explanation of Names
The common name refers to the brown belt on T2.
queen: body length 21-23 mm. Notably large.
male: 15-19 mm
worker: 9.5-18 mm
Diagnostic characters include black wings, black head, low position of ocelli, short dense hairs on thorax, and belt of contrasting brown hairs at base of T2. Males have large eyes. See detailed description of queen and male at
Tongue length: medium
widely distributed - Map - Discover Life
Broad, including urban parks.
mostly: Apr-Sept (BG data)
Partial to coneflowers (Echinacea) and other composites. The Hosts section of its Discover Life species page lists known associations based on specimen records and images.
Life Cycle
Emerges rather early in spring. Ceases activity much earlier in the fall than does B. impatiens.
After B. impatiens often the second most commonly encountered bumble bee at many sites in the eastern United States. However, it becomes relatively scarce northwards, as at Ithaca.
Internet References
Common name reference; PDF doc (Committee on Common Names of Insects, Entomological Society of America)
Link to photos of male genitalia (Natural History Museum, UK)
Discover Life. Live and pinned adult images