While there is no evidence of decline for this species, B. sandersoni is very difficult to identify (often confused with B. vagans), uncommon in Vermont, and little is known about its ecology. It has a short season with queens active from May through July, workers and males from June through August.
Select food plants: Epilobium, Monarda (Bee Balms), Penstemon (Beard Tongues), Rubus, Malus (Apples)
Tongue Length: short
Similar Species: Very difficult to identify. Confused with B. vagans and B. perplexus.
queens: May – July
workers: June – August
males: July – August