The Western Cattle Egret often called “Cow Bird” is native to Africa spreading to the United States in 1941. Found around cattle’s feet eating insects that are disturbed by grazing cattle, the egret also is known to eat small songbirds. The Egret is a member of the Heron family.
I noticed the cattle in the field running and stomping at the bird. The young herd didn’t like this Egret anywhere close to their calves. They had never seen such a strange looking bird. The bird in the photograph is an adult breeding male.
You can read more about the Western Cattle Egret at All About Birds.com.