Western Bumble Bee

Historically broadly distributed in western North America. Bombus occidentalis occurs along the Pacific coast and western interior of North America, from Arizona, New Mexico and California, north through the Pacific Northwest and into Alaska. Eastward, the distribution stretches to the northwestern Great Plains and southern Saskatchewan.  

NCC: Land Lines The buzz about bumble bees

IBP - Blog Post

Bumble Bees of the Western United States

Western Bumble Bee, Bombus occidentalis—On Sitka Valerian (…

Eureka! A Western Bumble Bee - Bug Squad - ANR Blogs

Species Illustrations - PNW Bumble Bee Atlas

Western Bumble Bee (Bombus occidentalis) · iNaturalist

Bumbles showing White - Bumble Bees of Washington State Bumble

Species Illustrations - PNW Bumble Bee Atlas

Bumblebee Pollination

Western bumble bee's nest discovered

Bumblebees bite plants to make them flower early, surprising scientists

Large Garden Bumblebee

Large Garden Bumblebee Suffolk Biodiversity Information Service