Rare "Blond" Penguin Spotted in Antarctica

The condition is known as isabellinism or leucism (like "leukocyte," or white blood cells), and not albinism, where no melanin is produced. Animals with isabellinism have a genetic mutation that dilutes pigments in the feathers, according to a 2009 study in Marine Ornithology. Though technically separate conditions, isabellinism and leucism are used interchangeably. Leucistic birds have a mutation that restricts the dissemination of pigment to feathers.

Here's the video: 

[Via National Geographic]