(1) A human path through the swamp is carved with a machete, although the resulting trail often seems like a feeble attempt at penetrating the hidden blackwater ponds and the massive jungles of titi , smilax, gallberry, cypress, and gum.(2) Robert Wallace, working for the New York-based Wildlife Conservation Society, was surveying in Bolivia's Madidi national park five years ago when he found what he concluded was a previously unrecorded species of titi monkey .(3) Voss played me an interview with a hunter that included the man's evocative imitations of the calls of titi monkeys .(4) And a few kilometres away, on the Pacific coast, American tourists sit in resorts, drinking cervezas and taking photos of the titi monkeys playing in a nearby tree.
