Male Bombus occidentalis Greene (background) and B. terricola Kirby (foreground) in Regina, Saskatchewan, possibly the most eastern location in Canada where both species at risk co-occur naturally. Photo by Cory S. Sheffield.

  Part of: Palmier K, Sheffield C (2019) First records of the Common Eastern Bumble Bee, Bombus impatiens Cresson (Hymenoptera: Apidae, Apinae, Bombini) from the Prairies Ecozone in Canada. Biodiversity Data Journal 7: e30953.