A phylogenetically controlled test of hypotheses for behavioral insensitivity to testosterone in birds.

@article{Lynn2005APC,
  title={A phylogenetically controlled test of hypotheses for behavioral insensitivity to testosterone in birds.},
  author={Sharon E. Lynn and Brian G Walker and John C Wingfield},
  journal={Hormones and behavior},
  year={2005},
  volume={47 2},
  pages={170-7}
}
In most male birds that exhibit paternal care, extending the spring testosterone (T) peak throughout the breeding season reduces nestling provisioning. However, in some species, this trade-off between high T and expression of paternal care is absent. For example, during some or all of the nestling period, T did not affect paternal behavior in Male Lapland longspurs (Calcarius lapponicus), chestnut-collared longspurs (Calcarius ornatus), and great tits (Parus major). Two ecological constraints… CONTINUE READING

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