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Like other reptiles, rattlesnakes are âcold-bloodedâ or ectothermic, relying essentially on outside heat sources rather than an internal metabolism to maintain their body temperature. They typically function most effectively at temperatures between about 70 and 90 degrees Fahrenheit (21 to 32 degrees Celsius).
Oppositely to warm up their internal temperatures, snakes lie in the sun for long periods of the day, resting on large hot rocks so the conduction of the heat will increase body temperature and keep them warm during the day. Snakes are said to use behavioural adaptations to regulate their body heat. This explains why they choose to move into a cold or a hot location at different times depending on whether they need to be hotter or colder, the snake has no biological way of regulating temperature, therefore behavioural adjustments have to be made everyday. Anna ; and y