Yesterday (April 19th) was celebrated here in Brazil the Indian Day, a (small) celebration for the original inhabitants of our country.
So, I'll recommend a movie, one of the best documentaries I've watched in theaters last year. And it features one of our largest remaining tribes, set in Alto Xingue, in the State of Mato Grosso.
As Hiper Mulheres (The Hyper Women)
Synopsis: Fearing the death of his elderly wife, an old man asks his nephew to make the Jamurikumalu, the biggest female ritual of the Alto Xingu (MT), for her to sing one last time. So, the women of the group start the rehearsals, while the only singer of the tribe that knows all the songs is very ill.
Trailer:
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It's a very unique movie, because it deals with a lot of themes like nudity, sexuality and feminism from an indigenous perspective.
Unfortunately, it's the kind of movie that'll only watch in festivals (even around here), but if you come up with this rare opportunity, grab it.