Emperor penguins are known for being shy, and this can be a challenge for biologists who are studying them. When these penguins are approached by researchers, their heart rates rise and they back away.
To stay warm and conserve energy during the breeding season emperor penguins form huddles, with thousands of birds packing in close together. New research describes the movement like "waves in a traffic jam."
Emperor penguins are the largest of all the varieties of penguins averaging a height of 115 centimetres. They also live in the coldest place on earth, Antarctica. Now scientists have discovered how they manage to survive the cold.
