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kevin妈妈 发表于 2016-5-19 10:56 
冬天蛇会出来晒太阳?不是冬眠的么
http://www.environment.nsw.gov.au/animals/Snakes.htm
Following the sun
Snakes are reptiles, which means they are ectothermic: they get their body heat from external sources. Endothermic animals, such as mammals and birds, regulate their body temperature internally. A snake's body temperature - and so its level of activity - is controlled by the temperature of the air and the ground. It will try to maximise body heat by basking in the sun or lying on or near warm surfaces such as night-time roads or even, on occasion, household water heaters.
In cold areas of the state, snakes hibernate during winter. However, in the more temperate climate along the coast they shelter in rock crevices and logs during cold weather and come out on warm days to soak up the heat of the sun. During cold weather, snakes are less active and therefore hunt less. In the winter their metabolisms slow down, and they use up body fat which has been stored up during the warmer months of the year. |
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