Polar Bear mother with three months old cubs playing between trees, on Tundra

polar bear snow covered ice bear snow cub arctic polar nanook wapusk np ursus wilderness hudson bay ursus maritimus tundra manitoba winter ice denning area lone predator denning site sea ice carnivore first steps maritimus fletcher lake resting on the move protecting newly born denning endangered watching freezing threatened playing churchill instinct no people mother carring priceless rare funny baby young cute