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Message: <blockquote data-quote="Peter C." data-source="post: 1356211" data-attributes="member: 68872">I haven't a very large "sample" to go by here, but in my experience it's more than 50% of the time - probably well more often than that (I've never kept a tally of this, unfortunately.) That is, more often than not, if I follow that special "caw" (which I understand to be a mobbing call), I find that they're on to something - usually a Great Horned, but occasionally it's been a hawk that just doesn't feel like flying away.  The unsuccessful times, I don't know about - but owls are really good at staying hidden, so it could just be that I'm unable to find it. That said, crows are very interesting birds, with a very complex social life, so they could also be making that sound for other reasons that I'm unaware of (maybe nobody is aware of).Peter C.</blockquote>