Yva Momatiuk & John Eastcott / American Beaver (Castor canadensis) a semi-aquatic rodent swimming across calm pond behind beaver dam on mountain river, fall foliage reflectd in water, evening, Denali National Park, Alaska

Sumio Harada / American Beaver (Castor canadensis) portrait, Rocky Mountains, North America

George Sanker / Coniferous forest and mountains reflected in beaver pond at sunrise. Grand Teton National Park, Wyoming, USA. June 2018.

Michel Roggo / North American beaver (Castor canadensis) lodge, and mountain landscape. Muskwa-Kechika Protected Area, Northern Rockies, British Columbia, Canada. July 20111. Photographed for The Freshwater Project

Scott Leslie / Beaver Dam Mountains from Beaver Dam Wash National Conservation Area, Utah

Enrique Lopez-Tapia / Peatland landscape in Tierra del Fuego with North American beaver (Castor canadensis) dam, an invasive species (introduced for fur trade). Argentina

Tim Fitzharris / Avery Peak reflected in beaver pond, San Juan Mountains, Colorado

Ingo Arndt / European Beaver (Castor fiber) dam, Bieszczady, Poland

Tim Fitzharris / Beavertail Cactus (Opuntia basilaris) with Picacho Mountain in the background, Pichaco Peak State Park, Arizona

Tim Fitzharris / Beaver dam and pond surrounded by boreal forest with Mount Robson in background Mount Robson Provincial Park, British Columbia, Canada

Tim Fitzharris / Haystack Mountain reflected in beaver pond, Maroon Bells, Snowmass Wilderness, Colorado

Tim Edwards / Beaver Lake surrounded by coniferous forest, Jasper NP, Alberta, Canada