American Bumble Bee, Museum of Natural History

The American Bumble Bee, Bombus pensylvanicus, is one of the most common bumble bee species found on the Front Range and is one of the 24 species found in Colorado. This species is found only in the lower elevations of the state (3500-5500 feet above sea level) and its range is one of the greatest for all North American bumble bees stretching from the grasslands east of the Rocky Mountains all the way to the coastal Atlantic states, north into Canada and south into Mexico.

The Quest to Tally Alaska's Wild 'Warm-Blooded' Bumblebees

Suckley's Cuckoo Bumble Bee

Bees Get a Big Tribute at the American Museum of Natural History - The New York Times

About the Collection, Museum of Natural History

Rusty-patched Bumble Bee Guide - New York Natural Heritage Program

Franklin's bumblebee (Bombus franklini), photographed at the Smithsonian Museum of Natural History, Washington DC. This is the first known species of North American bumble bee that is suspected to have gone extinct

Climate, pesticides, and landcover drive declines of the western bumble bee

Oak Spring Garden Foundation - Four At-Risk North American Bumble Bee Species

A Newbie in Denali · National Parks Conservation Association