The Influence of Habitats on Mating Systems of North American Passerine Birds

  title={The Influence of Habitats on Mating Systems of North American Passerine Birds},
  author={Jared Verner and Mary F. Willson},
Regardless of sex ratio, a polygynous mating is expected to be adaptive for the females as well as for the male. Two possible selective bases for the evolution of polygyny are considered: 1) One male may make it advantageous to several females to mate with him by appropriating a large share of a limited number of nest sites. 2) When a large share of the food for the young is obtained from the territory, local variations in food availability could influence the mating system. Given a sufficient… Expand
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