- BB Color Pattern Guide
- BB Illustrations, Jeremy Hemberger
- BB Males vs females
- BB Photos, Heather Holm
- BeeSpotter Midwestern U.S. Keys
- Botany Primer from Nature’s Notebook
- Bumble Bees of the Eastern U.S.
- Bumble Bees of the Western U.S.
- Bumble Bee Recovery, Wildlife Conservation Canada
- Bumble Bee Watch
- Community Science: Get Involved!
- Conserving Bumble Bees from The Xerces Society
- Managing Alternative Pollinators, SARE
- Rusty Patched BB Midwest Plant Guide
- The Very Handy Bee Manual
- Xerces Society BB Resources