Beavers may be helping to halt the decline of some amphibian populations, a study suggests.

Researchers, surveying streams in the forests of Alberta, Canada, found significantly more frogs and toads where beaver dams were present. They believe the beaver “ponds” may be providing favorable conditions for developing tadpoles.

[Read](http://news.bbc.co.uk/1/hi/sci/tech/6256565.stm “Read the Story”) (BBC)