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.  

Western Bumble Bee (Zion National Park Bumble Bee Guide

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

Western Bumble Bee – Oregon Conservation Strategy

Western Bumble Bee - Montana Field Guide

Western Bumble Bee (Bombus occidentalis) - JungleDragon

IBP - Blog Post

Climate, pesticides, and landcover drive declines of the western

Western bumble bee, Bombus occidentalis - Bumble Bees of

Are these Western Bumble Bees, Bombus occidentalis? : r/Entomology

Scientists fail to locate once-common CA bumble bees

Bumblebee blues: Pacific Northwest pollinator in trouble

Western Bumble Bee Species Conservation

Species Illustrations - PNW Bumble Bee Atlas

western bumblebee - Bombus occidentalis

Colorado's western bumble bee population in rapid decline, future