Why are incubation periods longer in the tropics? A common-garden experiment with house wrens reveals it is all in the egg.

@article{Robinson2008WhyAI,
  title={Why are incubation periods longer in the tropics? A common-garden experiment with house wrens reveals it is all in the egg.},
  author={Wayne D. Robinson and John D. Styrsky and Brian J. Payne and R Given Harper and Charles F Thompson},
  journal={The American naturalist},
  year={2008},
  volume={171 4},
  pages={532-5}
}
Incubation periods of Neotropical birds are often longer than those of related species at temperate latitudes. We conducted a common-garden experiment to test the hypothesis that longer tropical incubation periods result from longer embryo development times rather than from different patterns of parental incubation behavior. House wrens, one of few species whose geographic range includes tropical equatorial and temperate high latitudes, have incubation periods averaging 1.2 days longer at… CONTINUE READING

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