Emperor Penguins Huddle
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Emperor penguins in a huddle during a snow-storm. Normally penguins are very territorial and will not approach each other easily, but this behaviour is one of the ways that emperor penguins manage to survive successfully in the depths of the Antarctic winter. Scientific measurements and calculations have shown that by huddling together, emperor penguins use about half the energy that they would otherwise and would starve to death over the winter rather than come through and raise chicks as well.
The emperor penguin ( Aptenodytes forsteri ) is the tallest and heaviest of all living penguin species and is endemic to Antarctica . The male and female are similar in plumage and size, reaching 122 cm (48 in) in height and weighing from 22 to 45 kg (49 to 99 lb). The dorsal side and head are black and sharply delineated from the white belly, pale-yellow breast and bright-yellow ear patches. Like all penguins it is flightless, with a streamlined body, and wings stiffened and flattened into flippers for a marine habitat .
June 15, 2011—New, sped-up video of an emperor penguin huddle in Antarctica shows the group takes small steps, creating a wave. Researchers say the undulations ensure each penguin a turn in the middle of the cluster, which helps the birds keep warm.