The Western Bumble Bee was once among the most abundant bumble bees in the western United States but suffered a catastrophic population collapse in the late 1990s following commercial rearing for greenhouse tomato pollination, which spread a fungal pathogen. It is now federally proposed for endangered listing. It has yellow-and-black banding with a distinctive white tail.
Habitat
Mountain meadows, open forests, and subalpine grasslands of the West
Diet
Adults: pollen and nectar from diverse wildflowers
How common
Rare
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