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

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