North American Beaver (Castor canadensis) building a dam in Denali National Park, Alaska, USA

alaska america american animal animals area areas beaver beaver beavers beavers building canadensis castor castoridae conservation dam dams day daylight daytime denali during exterior exteriors fauna kingdom mammal mammalia mammalian mammalians mammals national national natural nature nobody north outdoor park park parks photo photos preserve preserves reserve reserves reservoir reservoirs rodent rodentia rodents sanctuaries sanctuary shot shots states tetrapod united us us american usa vertebrata vertebrate vertebrates wild wildlife world