We motored down a muddy tributary of the Ucayali River in the Peruvian Amazon, traveling quickly to make it home before dark. We had travelled upriver the day before with eight monitors from Nuevo Saposoa and Patria Nueva, communities of Peru's indigenous Shipibo-Conibo people. Our mission: to investigate and document areas that satellites had identified as possible sites of recent deforestation. As we passed a deforested area along the river, a man called us over from shore.