I've heard that if you hear a bunch of crows cawwing at something, its possible they are reacting to strutting turkeys. Supposedly, if you call and a Tom fans out but doesn't gobble, sometimes the crows will give away his position. I haven't had any personal experience with this, but If I hear crows going nuts, I'll keep this in mind. I have had alot of success with turkeys shock gobbling to my crow calls. I've had better luck with crow calls than owl hooters.