King penguin

King penguins are extraordinary parents. While one parent is guarding the chick, the other makes a trip of up to 400km (250 miles) in search of food. When the young are old enough, they are left with other juveniles so both parents can search for food. The adults return to the sea during the winter, leaving the chicks alone, and they are rarely fed during this time.

Source: http://www.bbc.co.uk/nature/life/King_Penguin

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