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Bees Grouped together #817127

Asked December 01, 2022, 3:07 PM EST

I attended the Pollinator Training on September 8, 2022 at the Kellogg Biological Station. I had shown you some pictures of a cluster of bumble bees I found in my yard and wondered what was happening and what type of bumble bees they may be. I am attaching a few pictures for you to review. I have more pictures if needed. Thanks for your help. Patty McNinch Tuscola Conservation District Technician

Tuscola County Michigan

Expert Response

There could be a few different explanations for the behavior in your photos. A lot depends on the context (e.g. the time of year, location, etc.) 
My best guess based on the information you have given me is that these are a couple of male bumble bees (drones) attempting to mate with a newly emerged queen bumble bee. Bumble bee colonies produce queens at the end of the season and each of these queens needs to mate before they seek out a sheltered location to overwinter. The colony that produced the new generation of queens does not survive the winter. 
An Ask Extension Expert Replied December 02, 2022, 11:42 AM EST

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