3. Potoo

This next bird is called the Potoo (“po-TOO”) for the sound it makes. These feathered animals are nocturnal, so you will hear their wails and see their yellow eyes only at night in the tropical regions of South America. Sounds like the basis of a horror movie.

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Potoo actually refers to a genus of birds. There are seven known species of the potoo. The Great Potoo (pictured above) is only  one type of potoo. Rare photos of the species during the day made the rounds online in recent years, freaking out a whole new class of people.

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