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alfalfa leafcutting bee (Megachile rotundata) at nest box

alfalfa leafcutting bee (Megachile rotundata) at nest box

Alfalfa leafcutting bees (Megachile rotundata) are solitary bees that lay eggs in narrow cavities, either natural or artificial, such as in a next box. The species is a critical pollinator of alfalfa crops. A new study led by researchers at North Dakota State University examined how the microclimates on different sides and levels of nesting boxes influence the bees’ egg-laying preferences and ensuing number of offspring. (Photo by Whitney Cranshaw, Colorado State University, Bugwood.org)

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