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Species Bombus californicus - California Bumble Bee

Large Bumble Bee - Bombus californicus - female Bombus californicus? - Bombus californicus - female Bombus possibly californicus - Bombus californicus Bombus bifarius? - Bombus californicus Bombus californicus? - Bombus californicus - female Queen Bombus vosnesenskii? - Bombus californicus - female Bombus species on Oxytropis sericea in at approximately 5,400 feet elevation - Bombus californicus Bumblebee with long face - Bombus californicus - female
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, Longhorn, Orchid, and Digger Bees)
Tribe Bombini (Bumble Bees)
Genus Bombus (Bumble Bees)
No Taxon (Subgenus Thoracobombus)
Species californicus (California Bumble Bee)
Synonyms and other taxonomic changes
Species status for Bombus californicus is controversial as some authorities regard it as merely a subspecies or color variety of Bombus fervidus. Many Bombus californicus, especially from northern and eastern sites, are extensively yellow and therefore closely resemble Bombus fervidus, differing only in presence of black hairs on Terga 1-4. Lack of strong divergence in DNA barcodes and other molecular markers also indicate that this species pair is less distinct than other controversial species pairs.
Color pattern of typical Californian females as in vosnesenskii but with all black hairs on head instead of extensive yellow hairs. Also malar space long and legs gangly. In the eastern portion of its range its color converges on fervidus, and the most extensively yellow californicus specimens are very difficult to separate from typical fervidus (see comments on taxonomy above) but have at least some black hairs on the terga (these can be inconspicuous) which are lacking in fervidus.
western North America
In California often found in oak woodland savannah at relatively low elevation
Often visits California poppies and Mariposa lilies (as do other bumble bees). The Hosts section of its Discover Life species page lists known floral associations based on specimen records and images.
Internet References