Reports

Bird Energetics: Effects of Artificial Radiation

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Science  24 Jan 1969:
Vol. 163, Issue 3865, pp. 387-390
DOI: 10.1126/science.163.3865.387

Abstract

Radiant energy reduces oxygen consumption in birds; this reduction is correlated with feather color, being greater in dark birds (26 percent reduction) than in white ones (6 percent reduction). With radiant energy (basking), the cow-bird effectively increased its insulation, thus shifting the lower end of the zone of thermal neutrality down by as much as 10°C (35° to 25°C).