The crested caracara, also known as the Mexican eagle, is a bird of prey in the family Falconidae. It is found throughout Central and South America but has been found in northern Minnesota to Tierra del Fuego. It was formerly placed in the genus Polyborus. Crested Caracaras are mostly silent, but when disturbed, they occasionally make a hollow rattling that sounds similar to running a stick along a fence. They throw their heads back, lifting their bills to the sky while giving a rattle. They tend to be more vocal during the breeding season. Here is a link so you can hear these cool birds as well.