The Harris hawk is more social then most other raptors. Typically raptors are loners tolerating other raptors only when breeding but Harris hawks often live in small social groups. Often breeding groups consists of a couple of adult males and one female. Immature birds will sometimes stay with their parents for two to three years helping to feed and raise new broods. Since there are not a lot of trees in the habitats in which they are found they will often perch on each others backs, called stacking. They will also hunt in a group using some of the same pack hunting techniques as lions and wolves. Harris hawks that hunt in a group are much more successful then those that hunt on their own.
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