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  Pollution causing massive frog mutation
Updated 09 July 2002, 07.17
Some of the mutated frogs
Some of the mutated frogs

Frogs around the world are being born with severe deformities because of pollution, say scientists.

  Click here to test your slimy creature know-how!

The usually four-legged slimy hoppers are growing extra legs or none at all because of pesticides and parasite infections, they say.

Some of the mutated frogs

Humans use chemical pesticides to protect crops from insects. But the chemicals seep into rivers and can contaminate the food that wildlife eat.

The pesticides harm frogs' natural defences, making it easier for them to pick up infections from flatworms called trematodes.

So far scientists have seen frogs with extra legs in 43 different US states and all over Canada.

And they warn it could be a massive environmental problem for humans and wildlife if something isn't done.

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