meanwhile, in brazil's maranhao state, indigenous communities have formed citizen patrolso protect the forest from tree poachers. [indistinct chatter] announcer: "earth focus" is made possible in part by a grant from anne ray foundation, a margaret a. cargill philanthropy; the orange county community foundation; and the farvue foundation. ñgxxka woman: the islands that are connected to the gabrielino tongva are the southern channel islands. the most significant one is pimu santa catalina island. woman 2: sometimes, on a clear day like this, where you can see catalina, i can imagine my ancestors paddling back and forth from here. it really doesn't look that far. the ti'at was not just a vessel to go out into the water. it kept us in contact with tribes north and south of us, along the coast, and for the groups that also lived on the channel islands. woma3: everything is a relationship when you're building those boats. it's all a relationship that you establish with that boat. and then to put her in the water,