B. griseocollis is a fairly common bumble bee in Vermont, however larger populations can be found south, along the Eastern seaboard. It seems to be more common in the Champlain and Connecticut River Valleys than in other parts of Vermont. It can be found in many habitats including meadows, urban gardens, and agricultural settings. This bumble bee has a short season with queens emerging in May. Colonies sometimes persist into September, but often die by August.
Select food plants: Asclepias (Milkweeds), Cirsium (Thistles), Helianthus (Sunflowers), Solidago (Goldenrods), Rhus (Sumacs), Lythrum (Loosestrifes)
Tongue Length: medium
Nest: nests on ground surface
Similar Species: B. bimaculatus, B. affinis
queens: May – September
workers: June – September
males: July – September