Cover image: Two males house finches (Carpodacus mexicanus) fight over a female. Developmental integration of feather production and coloration enables functioning of carotenoid-based sexual ornamentation in a diversity of behavioral contexts. Photo by Alex Badyaev. Submitted by Alexander V. Badyaev and Elizabeth A. Landeen, "Developmental evolution of sexual ornamentation: model and a test of feather growth and pigmentation."
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