Nick Upton / Tilt shot of a dam constructed by Eurasian beavers (Castor fiber) on a section of the River Otter, Devon, England, UK, June 2018.

Laurent Geslin / European beaver (Castor fiber) at river bank in urban environment at night, Grenoble, France, August.

Laurent Geslin / European beaver (Castor fiber) at night, France

Laurent Geslin / European beaver (Castor fiber) at night near a river, France

Sven Zacek / Trees that have been gnawed by Beavers (Castor fiber) Southern Estonia, October.

Claudio Contreras / American Beaver (Castor canadensis) splashing water with tail, Los Fresnos Ranch, Sonora, northwestern Mexico, February.

Andy Trowbridge / European beaver (Castor fiber) walking in snow. Southern Norway. February

George Sanker / American beaver (Castor canadensis) swimming, Grand Teton NP, Wyoming, USA, October

Orsolya Haarberg / Eurasian beaver (Castor fiber) swimming, Telemark, Norway, June

Orsolya Haarberg / Eurasian beaver (Castor fiber) demonstrating stick display, territorial behaviour, Telemark, Norway, June

Orsolya Haarberg / Eurasian beaver (Castor fiber) swimming underwater, Telemark, Norway, June

Orsolya Haarberg / Eurasian beaver (Castor fiber) demonstrating stick display, territorial behaviour, Telemark, Norway, June