Bombus

  • Family: Apidae
  • Approximate # species in our region: 19
  • Common name: bumble bees

Few other bees are as well-known and as beloved as bumble bees. These hairy, rotund bees are represented by nearly 60 species in the US, about 20 of which can be found in our region. Bumble bees form annual, social colonies which begins each spring with a queen and grows throughout the summer with help from workers. Bumble bees are one of the best groups for a gentle introduction to bee watching since most species are large, have distinctive patterning on their abdomens, and have longer flight seasons than most solitary bees.

It is worth noting that several other species of insects resemble bumble bees. Among bees in the northeast, Anthophora, Habropoda laboriosa, Ptilothrix bombiformis, and Xylocopa virginica are particularly effective bumble bee mimics. One way to distinguish between bumble bees and their lookalikes is that bumble bee females gather pollen in moistened pellets on their hind legs (corbiculae), whereas the mimics always carry pollen dry in brushes of hairs (scopae). With a bit of practice, you will also learn that bumble bees and mimics making buzzing noises at different frequencies when in flight.

In addition to this website, there are several other excellent guides to bumble bee identification – we’ve listed a few particularly good ones on our additional resources page.

Regional Species List:

Scientific NameSubgenusCommon NamePhenologyForage/Hosts
Bombus affinis[Bombus]Rusty-patched bumble beeApr-SepGeneralist
Bombus ashtoni[Psithyrus]Ashton’s cuckoo-bumble beeMay-AugSocial parasite: Bombus terricola, B. affinis
Bombus auricomus[Bombias]Black-and-gold bumble beeMay-AugGeneralist (long-tongued)
Bombus bimaculatus[Pyrobombus]Two-spotted bumble beeApr-AugGeneralist
Bombus borealis[Subterraneobombus]Northern amber bumble beeMay-SepGeneralist (long-tongued)
Bombus citrinus[Psithyrus]Lemon cuckoo-bumble beeMay-SepSocial parasite: Bombus impatiens; B. vagans
Bombus fervidus[Thoracobombus]Golden northern bumble beeMay-SepGeneralist (long-tongued)
Bombus flavidus[Psithyrus]Yellowish cuckoo-bumble beeMay-AugSocial parasite: Bombus rufocinctus, B. perplexus
Bombus fraternus[Cullumanobombus]Southern plains bumble beeMay-AugGeneralist
Bombus griseocollis[Cullumanobombus]Brown-belted bumble beeMay-AugGeneralist
Bombus impatiens[Pyrobombus]Common eastern bumble beeApr-NovGeneralist
Bombus insularis[Psithyrus]Indiscriminate cuckoo-bumble beeMay-AugSocial parasite: Bombus ternarius, B. terricola, B. fervidus
Bombus pensylvanicus[Thoracobombus]American bumble beeMay-OctGeneralist (long-tongued)
Bombus perplexus[Pyrobombus]Perplexing bumble beeApr-AugGeneralist
Bombus rufocinctus[Cullumanobombus]Red-belted bumble beeMay-SepGeneralist
Bombus vagans[Pyrobombus]Sanderson’s bumble beeApr-AugGeneralist
Bombus ternarius[Pyrobombus]Tricolored bumble beeApr-OctGeneralist
Bombus terricola[Bombus]Yellow-banded bumble beeMay-AugGeneralist
Bombus vagans[Pyrobombus]Half-black bumble beeMay-SepGeneralist