Eurasian beavers (Castor fiber), captive in breeding programme, United Kingdom, Europe

Eurasian beaver (Castor fiber), captive in breeding programme, United Kingdom, Europe

Eurasian beaver (Castor fiber), captive in breeding programme, United Kingdom, Europe

Tree felled by Eurasian beaver (Castor fiber) by Narew River close to Strekowa Gora village, Biebrza National Park, Poland, Europe

White willow (Salix alba) tree with base of trunk almost chewed through by Eurasian beaver (Castor fiber), Narew marshes, Podlaskie, Poland. MORE INFO: Beaver activity is crucial in keeping Poland's ancient marshes open and free of encroaching bushes and trees and their dams also help to maintain high water levels.

Eurasian beaver (Castor fiber) dam on drainage channel in Narew marshes, Podlaskie, Poland. MORE INFO: Beaver activity benefits much other wetland wildlife by helping to maintain high water levels in Poland's ancient marshes and swamp forests.

European beaver (Castor fiber) wildlife in Donau River, Regensburg, Upper Palatinate, Bavaria, Germany, Europe

Beaver damage or gnaw marks on tree on the bank of the Fulda near Kassel, european beaver (Castor fiber), Hesse, Germany, Europe

European beaver (Castor fiber), young animal sitting in the water and eating willow branches, Fulda, Hesse, Germany, Europe

Beaver European beaver (Castor fiber), tree felled by a beaver about 80cm thick, Naturpark Flusslandschaft Peenetal, Mecklenburg-Vorpommern, Germany, Europe

Beaver damage or gnaw marks on tree on the bank of the Fulda near Kassel, european beaver (Castor fiber), Hesse, Germany, Europe

Beaver bite (Castor fiber), fallen tree, Upper Palatinate, Bavaria, Germany, Europe

Tree felled by beaver, european beaver (Castor fiber), on the Fulda near Kassel, Hesse, Germany, Europe

European beaver (Castor fiber), swimming in the water, Fulda, Hesse, Germany, Europe

European beaver (Castor fiber) wildlife at the shore of Donau River, Regensburg, Upper Palatinate, Bavaria, Germany, Europe

European beaver (Castor fiber), Eder, Hesse, Germany, Europe

Beaver European beaver (Castor fiber), beaver swims towards the photographer after surfacing, Naturpark Flusslandschaft Peenetal, Mecklenburg-Vorpommern, Germany, Europe

Beaver European beaver (Castor fiber), portrait of one-year-old young animal in water, Peene Valley River Landscape nature park Park, Mecklenburg-Western Pomerania, Germany, Europe

European beaver (Castor fiber) in water, Eder, Hesse, Germany, Europe

European beaver (Castor fiber) feeding on a willow branch, Eder, Hesse, Germany, Europe

European beaver (Castor fiber) in water, Eder, Hesse, Germany, Europe

Castor fiber, European Beaver