A boy of the Yawalapiti people cools his head in the Xingu River in Brazil's Mato Grosso state on May 9.
Last month saw the start of preparations for the Yawalapiti ritual of Quarup, a multiday August celebration posthumously honoring people of importance to this Amazon Basin culture. Men caught fish to dry and store, while others stockpiled flour made from roots of the cassava plant.
Among the 2012 Quarap honorees will be a non-Indian: Darcy Ribeiro, an author, anthropologist, and politician who advocated for Brazil's indigenous peoples.
(Related pictures: "New 'Uncontacted' Tribe Found in Amazon.")
Why We Love It
"Capturing the boy as his head hits the water seizes a great moment, but the play of light and dark across his tattooed body adds a unique dimension."—Monica Corcoran, senior photo editor
"The lighting hides the branch in shadow and makes this photo more interesting ... When I first looked at it, I saw a perfect stop-motion of the boy diving into the water. Not until later did I realize he's only dipping his head in."—Echo Xie, photo intern