February 25, 2015
Great Horned Owl Nestling Bill Claps
In this clip we see the older owlet bill-clapping at some rather noisy American Crows. In both adults and older young, at least 3 forms of threat displays grade into one another. In the clip we see a mild threat- mild threats consist of agitated bill-clapping, hissing, occasional low, drawn-out screams, and other guttural noises. A behavior we have have seen from Mom and not the owlets yet is a second level threat consisting of fully spread wings arching in a 'wall' towards an intruder, this posture has also been accompanied by bill-clapping and hissing. We have not yet seen a third threat level consisting of spread wings, will-clapping, hissing, high pitching screams for a long duration, feet are also poised to strike.