Puerto Alegría, PeruOn a wooden platform in a tiny village on the longest river in the world, a giant anteater slurps pink yogurt from a plastic bucket as a man shoves a selfie stick in its face.

A pair of blue macaws crunches on cheese puffs. A toucan nibbles a saltine cracker. Sixty tourists screech, squeal, and cackle as they paw at a menagerie of wild animals. Sloths cling to human necks. Monkeys scramble over heads and shoulders. On a bench two turtles strain for freedom under the weight of human hands.

While animals are passed among the crowd, camera shutters click, and selfie sticks jut out at all angles. A woman holds a juvenile caiman, mouth agape, next to the head of her