Most reptiles, amphibians, and invertebrates don't need a supplementary source of heat at night. After all, it always gets cooler when the sun goes down, and experts speculate that this nightly drop in temperature is likely to be beneficial for these animals' long-term health.
However, different animals have different temperature preferences, and there is such a thing as too cold. If your pet's terrarium gets too cold at night for their needs, add a nighttime heat source to keep your pet healthy and comfortable.
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Reptiles are ectothermic ("cold-blooded"), which means that instead of producing their own body heat, they depend on external sources for warmth — ...
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