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Harris Høgen lever i Sonora ørkenen, Arizona, US - det er den eneste rovfugl i verden der lever og jager i familiegruppen, man kan faktisk sammenligne dem med en ulveflok, generelt kan det siges om rovfugle, at de lever en meget solitær tilværelse, men dette er så ikke gældedende for "The Harris Hawk"
Harrishøgen er faktisk ikke en rigtig høg - hverken høg eller våge men noget der imellem. Den er ret atypisk ved, at den ofte lever i familiegrupper, hvor høge ellers normalt er solitære.
Harrishøgen er en meget intelligent rovfugl, hvilket også ses, når de jager i gruppen. Hunnerne er, som hos de fleste andre rovfugle, de største og kan dermed tage det største bytte. Derfor ser man ofte, når Harrishøgene jager, at hunnerne placerer sig højt, og hannerne løber rundt på jorden og jager byttet op, hvorefter hunnerne kan slå byttet.
Harrishøgen er ikke kræsen. Den tager alt fra insekter og firben til kaniner og fugle op til fasanstørrelse. Den kan nedlægge et bytte, som er fire gange så tungt som den selv. Den lever i Syd- og Mellemamerika. Hunnen lægger mellem 3-5 æg, som klækker efter 32 dage. Harrishøge får ofte to kuld om året. Hunungerne fra første kuld hjælper ofte til ved udrugningen af næste kuld.
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The Harris's Hawk or Harris Hawk (Parabuteo unicinctus) formerly known as the Bay-winged Hawk or Dusky Hawk, is a medium-large bird of prey which breeds from the southwestern United States south to Chile and central Argentina. Birds are sometimes reported at large in Western Europe, especially Britain, but it is a popular species in falconry and these records almost certainly all refer to escapes from captivity.
The name is derived from the Greek para, meaning beside, near or like, and the Latin buteo, referring to a kind of buzzard; uni meaning once; and cinctus meaning girdled, referring to the white band at the tip of the tail. John James Audubon gave this bird its English name in honor of his ornithological companion, financial supporter, and friend Edward Harris. The Harris Hawk is notable for its behavior of hunting cooperatively in packs consisting of family groups, while most other raptors hunt alone.
Individual Harris Hawks range in length from 46 to 76 cm (18 to 30 in) and generally have a wingspan of about 1.1 m (3.6 ft) They exhibit sexual dimorphism with the females being larger by about 35%. In the United States, the average weight for males is about 710 g (25 oz), while the female average is 1,020 g (36 oz).[5] They have dark brown plumage with chestnut shoulders, wing linings, and thighs, white on the base and tip of the tail, long, yellow legs and a yellow cere. The vocalizations of the Harris's Hawk are very harsh sounds
They nest in small trees, shrubby growth, or cacti. The nests are often compact, made of sticks, plant roots, and stems, and are often lined with leaves, moss, bark and plant roots. They are built mainly by the female. There are usually two to four white to blueish white eggs sometimes with a speckling of pale brown or gray. The nestlings start out light buff, but in five to six days turn a rich brown.
Very often, there will be three hawks attending one nest: two males and one female. Whether or not this is polyandry is debated, as it may be confused with backstanding (one bird standing on another's back). The female does most of the incubation. The eggs hatch in 31 to 36 days. The young begin to explore outside the nest at 38 days, and fledge, or start to fly, at 45 to 50 days. The female sometimes breeds two or three times in a year. Young may stay with their parents for up to three years, helping to raise later broods
While most raptors are solitary, only coming together for breeding and migration, Harris's Hawks will hunt in cooperative groups of two to six. This is believed to be an adaptation to the desert climate in which they live. In one hunting technique, a small group flies ahead and scouts, then another group member flies ahead and scouts, and this continues until prey is bagged and shared. In another, all the hawks spread around the prey and one bird flushes it out.
The wild Harris's Hawk population is declining due to habitat loss; however, under some circumstances, they have been known to move into developed areas.
Trained Harris's hawks have been used to remove an unwanted pigeon population from London's Trafalgar Square.
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Pnpura yvttre cå ceving tehaq