International Owl Center -. Vocalizations. 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.
TSC is a high technology company primarily engaged in providing engineering consulting services and specialized products to the U.S. Government and industry. Consulting and research services span the systems life cycle from advanced concept development through logistics support.
Tourette syndrome (TS) is a problem of the nervous system that was first described by the French neurologist, Gilles de la Tourette, more than 125 years ago. The major symptom is tics. Tics are sudden, brief, involuntary or semi-voluntary movements (motor tics) or sounds (vocal tics).