A frog is a small, tailless amphibian with long back legs for jumping and smooth, moist skin. Frogs usually live near water and often make croaking sounds.
“Frog” comes from Old English “frogga” or “frocga,” likely related to words meaning “jumper.” It has Germanic roots and has been used in English for over a thousand years.
Frogs are like living health meters for the environment because their thin skin absorbs chemicals and pollution. When frog populations drop, scientists see it as a serious warning sign that something is wrong with the ecosystem.
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