What's That Bug? does not endorse extermination

Subject: cannot even decide what family…
Location: prairie 5 miles from foothills, Longmont CO
July 5, 2017 9:44 am
This large (3/4 inch) insect began flying into our garage regularly in June, emitting such an awful buzz that it sounded very like a UAS (drone). It came every day, circled around until it found its favorite niche (dark corner under steps to house proper) and then went quiet for a while. We thought it might be laying eggs. Not sure how to feel about that! We live in the country near Longmont CO. Any clues?
Signature: Linda

Brown-Belted Bumble Bee

Dear Linda,
This is a beneficial, native Bumble Bee, and of all the species pictured on the Color Guide to Colorado Bees on the Applewood Seed website, we believe it most resembles the Brown-Belted Bumble Bee,
Bombus griseocollis.  According to BugGuide:  “After B. impatiens often the second most commonly encountered bumble bee at many sites in the eastern United States. However, it becomes relatively scarce northwards, as at Ithaca.”   There are some very nice images on Discover Life

What's That Bug? does not endorse extermination
Location: Longmont, colorado
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