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Species Bombus sitkensis - Sitka Bumble Bee

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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 (Anthophila (Apoidea) - Bees)
Family Apidae (Cuckoo, Carpenter, Digger, Bumble, and Honey Bees)
Subfamily Apinae (Honey, Bumble, Long-horned, Orchid, and Digger Bees)
Tribe Bombini (Bumble Bees)
Genus Bombus (Bumble Bees)
No Taxon (Subgenus Pyrobombus)
Species sitkensis (Sitka Bumble Bee)
Explanation of Names
Author: Nylander, 1848
Very similar to the sympatric dimidiatus form of B. flavifrons but with a darker scutellum and a conspicuous buff tip to the abdominal apex.
Best known from the humid coasts of northern California and the Pacific Northwest but also extends inland in humid areas. Not expected at drier sites.
The Hosts section of its Discover Life species page lists known associations based on specimen records and images.
More common in the northern part of its range, such as Washington State, than in the southern portion such as the San Francisco Bay Area.
Internet References