Two mother polar bears (Ursus maritimus) with cubs of the year watch a male bear feeding on a fin whale carcass in Svalbard, Norway

polar bear ursus maritimus fin whale carcass arctic mother cubs feeding svalbard wildlife natural behavior animal interaction cold environment marine mammal family habitat ecology predator scavenger observation conservation snowy landscape ecosystem dynamics watching nature wilderness climate diet ecosystems cub development icy terrain biodiversity biological kingdom research northern