Ohmart R D, Lasiewski R C
Science. 1971 Apr 2;172(3978):67-9. doi: 10.1126/science.172.3978.67.
Roadrunners sunning in artificial sunlight consume oxygen at standard (basal) levels at ambient temperatures as low as 9.0 degrees C. Energy savings of sunning roadrunners averaged 551 calories per hour. In the dark, birds may undergo hypothermia. Hypothermic roadrunners can elevate their body temperatures to normal levels by sunning, at reduced metabolic cost.
在人工阳光下晒太阳的走鹃在环境温度低至9.0摄氏度时，以标准（基础）水平消耗氧气。晒太阳的走鹃平均每小时节省551卡路里的能量。在黑暗中，鸟类可能会体温过低。体温过低的走鹃可以通过晒太阳将体温提升到正常水平，且代谢成本降低。
