Most people know that Great Horned Owls hoot. But most don't realize that there are several types of hoots, plus a variety of chitters, squawks, hisses, and bill clacking also in their repertoire. Karla is working to record the complete vocal repertoire of the Great Horned Owl along with associated behavioral context, which is why she is breeding Rusty and Iris in captivity.
Vocalizations in owls are hard-wired, not learned, so their vocalizations in captivity shouldn't differ from owls in the wild.
So far these are the types of vocalizations Karla has documented:
Wild (with Single Squawks)
Hoot - minus last note
The International Owl Center advances the survival of wild owl populations through education and research. We plan to accomplish our mission through biological and cultural programs and displays, green building design, citizen-science and other research, international exchange of information, the World Owl Hall of Fame, the International Festival of Owls, and other means.