Guaycuru(redirected from Mbayá)
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a group of South American Indian tribes united on the basis of linguistic features. The Guaycuru consist of the Toba, Mocovi, and Pilaga tribes, as well as some of the Abipon and Mbaya tribes, which were almost completely exterminated during the colonization period. They live in the Argentinian Chaco to the west of the Paraguay River, along its tributaries, and along the lower reaches of the Paraná River. The population is approximately 20,000 (there are no exact figures). The chief occupations of the Guaycuru are hunting and fishing; some of the Indians work on plantations and at timber logging.