JEB -- Léger and Larochelle 209 (1): 103 Figure IG6

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Fig. 6. (A) Temperature differences influencing the heat gained from the skin by the external surface of the insulation plumage on a pigeon's wing (T_SIW-T_PIW) and the loss of this heat to the surroundings by convection (T_PIW-T_AIR) and radiation (T_PIW-T_ASK) at T_AIR=T_ASK=25°C. (B,C) Predicted effects of lowering both air (T_AIR) and artificial sky (T_ASK) temperatures (B) or only T_ASK (C). The wing temperatures are those of the external surface of the plumage (T_PIW) and of the skin (T_SIW).