Abstract
Feral pigeons (Columba livia) showed two sorts of nonrandom mating: sizebased assortative mating and plumage-based disassortative mating. Size-based mating was evident in that individuals of like sizes were paired; such mating was presumably based on perception of size or a size-correlated variable, such as social dominance rank, by both sexes. Plumage-based pairing was evident in that individuals of unlike plumages were bonded; this was based on perception of unlike plumage patterns, probably by females. Both sizebased and plumage-based pairing influenced reproductive output.
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