Science. 1980 May 30;208(4447):1052-3. 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.
入射角度对光羽和暗羽的辐射热负荷的影响已确定。随着入射角度接近太阳辐射源增加，光羽和暗羽之间的热传递差异消失。因此，通过姿势调整，深色鸟类可能在辐射热负荷方面变得具有热白外观。
