Although the haka is a traditional dance form of the Māori of New Zealand, the use of a haka by the All Blacks rugby team before matches has made it familiar worldwide, and various haka have been adopted by sports teams outside New Zealand, particularly American football teams in the United States. Though some teams do contain Maori players, frequently the haka has been performed by teams with players from other Polynesian groups, indicating that it has become part of a pan-Polynesian sports culture.