This morning was leaving for work, standing in the back yard talking to the contractor working on my house when 2 crows were making a racket, squawking like no bodies business. Looked up into the walnut tree and there was the largest hawk I had ever seen. Question, this didn't look like a red tailed hawk it was huge, and was mostly light in color. Anyone have any ideas what kind of hawk? Or do they change colors for the winter? Chickens ran under coop and hide. I doubled checked everything to make sure the hawk couldn't get my girls.