What is the primary distinguishing facial feature of the adult yellow-eyed penguin?

Answer

A pale yellow band circling the eye

The common name is derived directly from the most obvious feature, which is a pale yellow band of feathers that circles the eye and extends around the back of the head.

What is the primary distinguishing facial feature of the adult yellow-eyed penguin?

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Yellow Eyed Penguin: the RAREST PENGUIN?! Animal Fact Files

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