Acquisition of breeding coloration depends on badge size in male house sparrows Passer domesticus

Abstract

The black throat “badge” of the male house sparrow Passer domesticus, which functions as a status signal of dominance rank, changes in size during late winter because light feather tips gradually wear off. Males change the size of their visible badge earlier if their final badge size is large. The differential timing of the change from winter to breeding… (More)
DOI: 10.1007/BF00171682

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