Originally Posted by maryellen21
He picked out chicken hawk, goshswk, and a few light colored hawks.... so it's a mute point if he can't pick one ...
I don't think there are any purely white hawk species in NJ... There are gyrfalcons which are nearly pure white, but they are not native to NJ (although there could be a very small chance a falconer's bird escaped, being that they are very common in falconry). Goshawks are definitely lighter in color and are native. Cooper's can appear on the lighter side, and are pretty big and are known for attacking chickens (one attacked my silkie last spring). There are also Sharp-shinned hawks which can appear lighter, but are smaller and usually eat songbirds. However like mechanic57 said, you could have been extremely lucky and seen a leucistic variety of hawk.