The distribution of the Harris' Hawk (Parabuteo unicinctus) in the United States is limited to the southern regions of California, Arizona, New Mexico, and Texas, with occasional records as far north and east as Ohio and Louisiana (AOU Check-list, 1957).
With the exception of three sightings in the Colorado River Valley in the southernmost part of Nevada (Linsdale, Condor53:228–249, 1951; Johnson, Condor 58:449–452, 1956; Lawson, Western Birds 8:73–90, 1977), and one sighting in southwestern Utah (Behle and Perry, Utah Birds, Utah Museum of Natural History, Salt Lake City, 1975:14), the Harris' Hawk has not been reported north of the western part of its range. This paper reports a second sighting of a Harris' Hawk in southern Utah.
Martin Bray, Gordon Hildebrant, and I independently identified an adult Harris' Hawk on five occasions between 1 August and 9 September 1978 in the Henry Mountains, Garfield County, Utah, 35 km south of Hanksville.