Most amphibians live in moist places near rivers, streams or lakes. They have thin moist skin and cannot usually tolerate dry conditions. Amphibians are thought to be the descendants of the first animals to emerge from the sea onto land. Most amphibians are still partly aquatic, especially in their breeding habits.
Why are amphibians important to humans?
Frogs and toads are particularly important in tropical regions because they keep insect pests under control. They eat enormous numbers of insects, and their tadpoles feed on pests such as mosquito larvae. Unfortunately, frogs are increasingly caught as food, and so their numbers are greatly reduced. Their thin skin makes them very susceptible to the poisonous effects of crop sprays, contributing further to their reduced numbers.
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