Dept. of Agriculture

Northwest bumble bee populations

Want to help track bumble bee population? (Portland Tribune, 4/22/18)

Bees of Oregon: a selection from the more than 500 species found in Oregon [PDF] (2017) Oregon Department of Agriculture, Insect Pest Prevention and Management

Bumble bees of Western America (Hymenoptera:Apoidea) [PDF] (1957) Oregon State College, Agricultural Experiment Station