Dinosaur National Monument Bumble Bee Guide 🐝

Queen 24 - 25 mm
Worker 15 - 21 mm
Male 16 - 19 mm
Floral Association: Astragalus, Balsamorhiza, Ceanothus, Cirsium, Helianthus, Melilotus, Ribes, Vicia
Nest: Nest underground, sometimes on the surface
Similar Species:
American Bumble Bee (B. pensylvanicus)
Golden Northern Bumble Bee (B. fervidus)
Black and Gold Bumble Bee (B. auricomus) US Eastern Temperate Forest region
Phenology:
Males: Small peak from Mid-May to Early July, Full peak from Mid-July to Late April
Workers: Slow increase from Mid-April to Mid-June, Full peak from Mid-June to Early September
Queens: Early April to Late June less ↑