by there warm fat
whales keep warm by their blubber! good question
The fur on their bodies keep them warm.
They don't need to keep warm, they have a double coat so they stay warm.
They urinate on their feet to keep warm.
heat keep us warm :)
The materials keep you warm by the fabric they are made out of!
what keep you warm in alska
they keep warm by sleeping in long grass.
Cats have fur to keep them warm when they are cold.
big time rush ,icarly, victorious, buckit and Skinner's of anubs, drake and josh, supah ninjas,pingens of madagascar, spongbob,
Animals need to keep warm, some keep warm by the fur that they have, penguins huddle up they make a circle 1 stands in the middle 2 keep warm then the next 1 goes and they keep going.
They do not HAVE to be warm. I keep mine under a light built into the lid to keep him warm. It is nice to keep your fish warm. It is very pleasant in winter. I would suggest a warmer.