Question

How birds and polar bear keep their body warm in winter ?

Answer 1

Answer:

Polar Bears

Nature has given polar bears enough insulation to prevent body heat from escaping. They are toasty warm and comfortable in the frigid arctic. ... Next to the skin is a dense layer of woolly fur that also keeps heat in. The fur you see is a thick layer of long, colorless guard hairs that shed water quickly after a swim.

Birds

A bird's body heat warms the air between its feathers,” Marra explains. “So birds fluff up in the cold to trap as much air in their feathers as possible. The more trapped air, the warmer the bird.” ... One way birds keep their legs and feet warm is to stand on one leg, while the other is tucked up warmly in its feathers.

Answer 2

Answer:

Polar bear

Explanation:

They are incredibly well insulated with a layer of blubber that can be up to 10cm thick covered with another 15cm of fur. Polar bears lose so little heat to their environment that they are almost invisible to thermal imaging cameras