EXT XEN.0011 Midwest Bumble Bee Identification, Ecology, and Conservation

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Species – Bumble Bees of Wisconsin – UW–Madison

Maryland Biodiversity Project - Common Eastern Bumble Bee (Bombus impatiens)

Midwest Native Bee Alliance

Scientists fail to locate once-common CA bumble bees, Bumble Bee

Minnesota Seasons - tricolored bumble bee

Western bumble bee Washington Department of Fish & Wildlife, Bumble Bee

The unexpected links between declining bumble bee species - Wildlife Preservation Canada

Twin Cities Bumble Bee Survey

Documenting Bombus nevadensis in Minnesota, with some notes on discerning it from B. auricomus (Hymenoptera: Apidae)

Brown-belted Bumble Bee - Montana Field Guide

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Minnesota Seasons - tricolored bumble bee

Bumble bee survey : Minnesota Bee Atlas : Citizen science : University of Minnesota Extension

Bumble bee species distributions and habitat associations in the Midwestern USA, a region of declining diversity