Nests of loosely arranged sticks, rocks, or dirt are cooler in temperature at the bottom where the egg contacts the nesting material.
用细棍、石子或泥土松散地搭建的巢穴在筑巢材料与鸟蛋接触的巢底温度是比较低的。
Nests of loosely arranged sticks, rocks, or dirt are cooler in temperature at the bottom where the egg contacts the nesting material.
用细棍、石子或泥土松散地搭建的巢穴在筑巢材料与鸟蛋接触的巢底温度是比较低的。
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