Environmental conditions during birds' nonbreeding season can affect the manifestation of secondary sexual traits and therefore sexual selection. In pied flycatchers, the size of the wing patch is a secondary sexual trait that signals mate value and is influenced by the previous winter's conditions. Female preference changes accordingly with the conditions of the previous nonbreeding season.
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| http://dx.doi.org/10.1111/evo.13588 | DOI Listing |
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