They are REALLY big - Like EAGLE tall. The male starts to get a bit antsy when the eagles are flying over head. You can see he watches them VERY closely. He's ready to spring into action to protect the nest.
right, I suspect it was perhaps one of these which I saw flying off down in northern Oregon many years ago with a 5 week old puppy I had just set out on the beach for a minute, I never got a good enough look to Id it...but it looked huge!