Trunk of Silver Birch with damage from gnawing by Eurasian beaver (Castor fiber), beaver-watching hide in distance, beaver reintroduction site, Aigas, Scotland UK, BEAVERS,BEHAVIOUR,CONSERVATION,EUROPE,HABITAT,LAKES,LANDSCAPES,MAMMALS,rodents,SCOTLAND,TREES,TRUNKS,UK,VERTEBRATES,WATER,United Kingdom,Plants,British, Niall Benvie