What is a horned screamer? Horned screamers are the unicorns of the bird world. Over the course of their lives, these birds grow long, white spines of cartilage in the middle of their foreheads.

These “plumicorns” resemble horns or, to some, catlike ears. Great horned owls are adaptable birds and live from the Arctic to South America. They are at home in suburbia as well as in woods ...