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Parabuteo unicinctus, Wüstenbussard, Wüstenadler, Harris Hawk The Harris's Hawk or Harris Hawk, formerly known as the Bay-winged Hawk, (Parabuteo unicinctus), is a medium-large bird of prey which breeds from the southwestern USA south to Chile and central Argentina. It is the only member of the genus Parabuteo (Ridgway, 1874), which literally means 'similar to Buteo'.
Its habitat is sparse woodland and semi-desert, as well as marshes (with some trees) in some parts of its range (Howell and Webb 1994). It nests in a tree and lays 2–4 eggs, incubated for 28 days to hatching.
It has blackish brown plumage with chestnut forewings (above and below) and thighs. The end of the tail and the rump are white. It has a length of 60 cm and a wingspan of 1.2 m; the average weight is about 900 g (2 pounds). Females are typically 10% bigger than males.Harris's Hawks' social behavior is unusual for raptors. Young may stay with their parents for up to three years, helping to raise later broods. They also hunt together, groups of two to six birds often cooperating to flush and then capture prey (group hunting). In contrast, the vast majority of raptors are solitary hunters, and not at all gregarious.....In the United States desert southwest, Harris's hawks sometimes engage in a behavior called 'stacking'. Two or three birds may perch one atop the other. Researchers note that when this occurs, the more dominant bird is actually the one on the bottom of the stack. The social dynamics are that when a low-status bird is approached by a higher status bird, the low-status bird will abandon a perch. However, a higher status bird will retain its perch, and end up with one or two lower status birds atop it.The Harris's Hawk can, if trained well, take a wide range of prey, being able to almost match the Goshawk. They can easily catch and kill a rabbit, a hare or even a pheasant, but its natural prey are small rodents and reptiles.Source:Wikipedia
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