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

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