Why do all the venomous animals live in hot climates?
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Many, but not all, venomous animals are cold blooded; so they thrive in hot climates. Cold blooded animals typically conserve energy, so it’s theorised those that evolved to use venom had an advantage (survival of the fittest) as they could kill with less risk, and so became more prominent. It’s likely this evolutionary benefit that meant you also have venomous mammals and fish and also some venomous animals that live in cold climates. We have a venomous snake in the UK called an Adder.
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