Avian thermoregulation in the heat: scaling of heat tolerance and evaporative cooling capacity in three southern African arid-zone passerines.

@article{Whitfield2015AvianTI,
  title={Avian thermoregulation in the heat: scaling of heat tolerance and evaporative cooling capacity in three southern African arid-zone passerines.},
  author={Maxine C Whitfield and Ben Smit and Andrew E McKechnie and Blair O Wolf},
  journal={The Journal of experimental biology},
  year={2015},
  volume={218 Pt 11},
  pages={1705-14}
}
Many birds can defend body temperature (Tb) far below air temperature (Ta) during acute heat exposure, but relatively little is known about how avian heat tolerance and evaporative cooling capacity varies with body mass (Mb), phylogeny or ecological factors. We determined maximum rates of evaporative heat dissipation and thermal end points (Tb and Ta associated with thermoregulatory failure) in three southern African ploceid passerines, the scaly-feathered weaver (Sporopipes squamifrons, Mb≈10… CONTINUE READING
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