What's all the noise?

 Polar bears are quiet solitary animals and depend on smell to navigate the icy tundras. But they have a spectrum of interesting sounds they will employ including grunts (like these above), moans, chuffs, purrs and growls. These can be heard during encounters of  aggression or mating, or when communing with cubs.

Listed as a vulnerable species by the IUCN Red List, the polar bear is facing a steeper slope toward extinction for each year that sea ice loss continues. Climate change is quickly forcing the world's largest carnivore to seek asylum in forests further south, where it is not suited for survival.