CLOSED: Larger than Bombus Ternarius

Aurora, CO(Zone 4a)

Awhile back, I posted photos of what I referred to as the largest bee I'd ever seen. Your replies helped me to determine that he was Bombus Ternarius. I just saw a bee that was exponentially larger than Bombus Ternarius. He has a curious spot between his shoulder blades (or whatever that area is called). Can one of you provide me with an ID? Thanks so much.

Thumbnail by wingwoman Thumbnail by wingwoman
(Zone 7a)

Could be this one...

http://bugguide.net/node/view/101105

Aurora, CO(Zone 4a)

Ah yes, the Brown-belted Bumble Bee. Looks just like him. Truly massive compared to our other locals. My Google results claim them to be aggressive against other bees, even those of the same species. Their size alone is enough to convince me to give them a wide berth. Thanks so much for your help.

(Zone 7a)

You're very welcome. ^_^

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