Bombus pensylvanicus

Bumble Bee

FWS Focus



Once thought to be among the most common and widespread bumble bee species in North America, the American bumble bee has experienced sharp declines in recent decades. According to an assessment published by the International Union for Conservation in Nature in 2014, American bumble bee losses amount to an 89% reduction in abundance relative to other bee species that share their habitat. These declines are most pronounced towards the northern extent of the species' range. Like most bumble bees, this species faces threats from multiple sources including pesticides, habitat loss or degradation, urban development, climate change climate change
Climate change includes both global warming driven by human-induced emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. Though there have been previous periods of climatic change, since the mid-20th century humans have had an unprecedented impact on Earth's climate system and caused change on a global scale.

Learn more about climate change
, and diseases that can be introduced by non-native bee species.   

A relatively large bee, the fuzzy black-and-yellow American bumble bee prefers the habitats offered by farmlands and open fields, where they nest below the grass or underground. The loss of this species on the landscape could have devastating impacts on pollination of the many native plants they are known to use, as well as agricultural crops.

Scientific Name

Bombus pensylvanicus
Common Name
bumble bee
American bumble bee
FWS Category

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