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Published on Mar 25, 2012
An Alfalfa Leafcutter Bee (Megachile rotundata) is on top of a Hornfaced Bee (Osmia cornifrons). I'm not sure if the Leafcutter is trying to attack the Hornfaced bee, or if it is trying to hump it. Either way, the attempts are a failure. The Hornfaced bee acts like it is unaware of the Leafcutter.