Ananova:

Green campaigners called in police after discovering an illegal logging site in a nature reserve - only to find it was the work of beavers.

Environmentalists found 20 neatly stacked tree trunks and others marked for felling with notches at the beauty-spot at Subkowy in northern Poland.

But police followed a trail left where one tree had been dragged away - and found a beaver dam right in the middle of the river.

A police spokesman said: "The campaigners are feeling pretty stupid. There's nothing more natural than a beaver."