Autumnal territorial aggression is independent of plasma testosterone in mockingbirds

@article{Logan1990AutumnalTA,
  title={Autumnal territorial aggression is independent of plasma testosterone in mockingbirds},
  author={Cheryl A. Logan and John C Wingfield},
  journal={Hormones and Behavior},
  year={1990},
  volume={24},
  pages={568-581}
}
Mockingbirds (Mimus polyglottos) show intense territorial activity in the autumn as newcomers attempt to establish space within resident populations. Examination of autumnal territorial behavior showed that unmated males sing more and engage in more territorial fights than mated males. Newcomers that have just acquired space also sing more and show more territorial fights than birds resident to the population for at least one prior season. Among established residents, the average number of… CONTINUE READING

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