April-emerging Bombus queens id guide showing color patterns on bees for identification. Species included are Bombus impatiens, ternarius, bimac, perplexus, fervidus, vagans, affinis, fraternus, terricola
May emerging Bombus Queens from "Bees of Eastern North America" showing id patterns for Bombus griseocolis, rufocinctus, auricomus, borealis, pensylvanicus, sandersoni, and frigidus
Are you also gearing up for Bombus queen season? The ladies are already flying around Chicagoland, so I collaged together the queen IDs from Colla, Richardson, & Williams for quick reference.
See the full pdf here on @xercessociety.bsky.social :
www.xerces.org/sites/defaul...