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 bears ursus maritimus cubs male bear fin whale carcass feeding behavior arctic habitat svalbard wildlife nature mother environment cold climate animal ecosystem marine life snowy terrain interaction maternal instincts sea ice natural prey scavenging observation predator preservation family circle biodiversity zoology conservation mammals carnivorous habits study dynamics wilderness rugged