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Effects of blood collection on wild birds: an update
Blood sampling is often critical for answering a variety of questions about wild birds. However, it is important to assess the impacts, if any, of blood collection on wild birds. Here, we examinedExpand
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No evidence for acoustic mate-guarding in duetting buff-breasted wrens (Thryothorus leucotis)
There are few empirical tests of the acoustic mate-guarding hypothesis for the function of duetting in birds. This hypothesis states that when females are fertile, males initiate many songs or answerExpand
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Tropical field endocrinology: ecology and evolution of testosterone concentrations in male birds.
Comparative research on natural populations of vertebrates, in particular avian species, has been instrumental in documenting the existence of interspecific variation in the hormonal regulation ofExpand
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Context matters: female aggression and testosterone in a year-round territorial neotropical songbird (Thryothorus leucotis)
Testosterone promotes aggressive behaviour in male vertebrates during the breeding season, but the importance of testosterone in female aggression remains unclear. Testosterone has both beneficialExpand
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Functional reference in an alarm signal given during nest defence: seet calls of yellow warblers denote brood-parasitic brown-headed cowbirds
Field observations and model-presentation experiments have shown that yellow warblers (Dendroica petechia) produce “seet” calls preferentially in response to brood-parasitic brown-headed cowbirdsExpand
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Strategic use of allopreening in family-living wrens
  • S. Gill
  • Biology
  • Behavioral Ecology and Sociobiology
  • 11 February 2012
A prominent interaction in the lives of social mammals is allogrooming. Individuals allogroom strategically and preferentially, grooming high-quality individuals that control access to resources.Expand
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Nest Defence By Yellow Warblers: Recognition of a Brood Parasite and an Avian Nest Predator
Yellow warblers (Dendroica petechia) were exposed to taxidermic mounts of a brood parasite (brown-headed cowbird, Molothrus ater), avian nest predator (common grackle, Quiscalus quiscula) and controlExpand
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Host responses to cowbirds near the nest: cues for recognition
Two cues (bill shape and vocalizations) that yellow warblers, Dendroica petechiamay use to recognize brown-headed cowbirds, Molothrus aterwere examined experimentally. Female yellow warblersExpand
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Males of a single-brooded tropical bird species do not show increases in testosterone during social challenges
The challenge hypothesis poses that in socially monogamous vertebrates, males increase circulating testosterone in response to aggressive challenges to promote intense and persistent aggression.Expand
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