Nest sanitation does not elicit egg ejection in a brown-headed cowbird host

  title={Nest sanitation does not elicit egg ejection in a brown-headed cowbird host},
  author={Brian D Peer},
  journal={Animal Cognition},
Most passerine birds practice nest sanitation whereby they remove debris from their nest. Nest sanitation has been posited as a pre-adaptation for egg ejection by hosts of avian brood parasites. However, relatively few North American hosts of the brood parasitic brown-headed cowbird (Molothrus ater) eject cowbird eggs to the detriment of their fitness. In this study, I added either a piece of flagging tape or a pine cone bract scale along with an artificial cowbird egg to nests of the red… CONTINUE READING
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