I forgot to mention skunks and lynx to my list as well. Just shot a skunk in the yard the other night. They prefer eggs more than birds because of the fact that they aren't very fast. I'm sure that they would take a setting hen though.
I'm just suprised than no one mentioned rattle snake yet. We...
In Northern WI here we have.......
Racoon
Mink
Rats
Fox
Coyotes
Timber wolves
Bob cats
Mountain lions
Great horned owl
Sparrow hawk
Red tailed hawk
Bald eagle
Pine martins
Badgers
Weasels
Stray dogs
Feral cats
and even Sea Gulls. ( Take young chicks)
How the heck do you protect your chickens...