SALT LAKE CITY (AP) — A federal review of existing data unveils an alarming trend for the western bumblebee population, which has seen its numbers dwindle by as much as 93% in the last two decades.

The Deseret News reports the find by the U.S. Geological Survey will help inform a species status assessment to begin this fall by the U.S. Fish and Wildlife Service, which may ultimately add the insect to its endangered species list.

Researchers say there are multiple factors at play that are contributing to the demise of the bumblebee, including pesticides, habitat fragmentation, a warming climate and pathogens.

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