Juarez Sena Feitosa was born in the Cantão region, right next to what became RPPN Canto do Obrieni. He was a fisherman and hunter for over thirty years, and knows the region intimately. When Cantão Park was created in 1998, he became one of its first rangers, and soon became instrumental in shutting down fish poacher gangs. Since 2012, he is Instituto Araguaia’s head ranger and research assistant, detecting poachers, tracking endangered species, doing outreach at public schools and community events, and guiding scientists and park patrols in the vast Cantão wilderness.