COROSHA, Peru — Homero Francisco Lopez shudders as he recalls how he used to hunt one of the world’s most endangered monkey species. “I'm ashamed when I think about it now,” says the 58-year-old subsistence farmer. He once shot a yellow-tailed woolly monkey because it had playfully goaded him. “But now that we have learned what a unique animal it is, and how it can even bring tourists here, we want it protected.”