Natural selection: Fair weather cooperators.

Curr Biol

Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95064, USA.

Published: November 2022

An impressive long-term study of Greater Ani birds reveals fluctuating selection for group size. In wet years, with abundant food, larger groups enjoy greater protection from predators. In dry years, however, larger groups suffer greater nestling mortality relative to smaller groups.

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http://dx.doi.org/10.1016/j.cub.2022.09.050DOI Listing

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