Publication: Mate choice drives bill size in a tidal marsh sparrow

A recent publication by a SHARP investigator in the journal, Behavioral Ecology, describes how female mating preferences drive the evolution of larger male bills in Coastal Plain Swamp Sparrows.  This bill size pattern is found in many tidal marsh specialists, and Olsen and his co-authors hypothesize how it may have arisen repeatedly due to female mating preferences within the tidal marsh.

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