This is a Northern crested caracara (Caracara cheriway) doing what is known as a “head throw back” display. The bird tends to make a cackling sound when it does this move. Sometimes it’s a display in courtship, still others it’s one of dominance or even to notate that the bird is feeling its oats.
A second thing to note is the bird’s craw (or crop) which is full and is bulging out of his feathers. You can see the stretched yellow skin.
Scott Bourne is an Olympus Visionary, a professional bird/wildlife photographer, author and lecturer who specializes in birds. He is a pioneer in digital photography and was named one of the “30 most influential photographers on the Web” by Huffington Post. His photographic experience spans four decades and his bird/wildlife images have been published in more than 200 magazines and periodicals. He is also a Signed Master at Studio of Masters in China.
Scott has been a founder, co-founder, advisor or early stage investor in several technology companies such as NetRadio, Photofocus, and ViewBug.