Interaction Between Posture, Color, and the Radiative Heat Load in Birds

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Science  30 May 1980:
Vol. 208, Issue 4447, pp. 1052-1053
DOI: 10.1126/science.208.4447.1052


The effect of the angle of incidence on the radiative heat load was determined for light and dark plumage. As the angle of incidence to the solar radiation source increases the difference in heat transfer between light and dark plumage disappears. Thus, by postural adjustment, a dark bird may become thermally white with regard to the radiative heat load.