Hoatzin

A punk-crested bird whose chicks have claws on their wings/Small Animals

The hoatzin (Opisthocomus hoazin) of South America's Amazon and Orinoco river basins is one of the most unusual birds alive. About 65 cm long, it has a spiky rust-colored crest, blue face, and red eyes. Uniquely among birds, it digests leaves by bacterial fermentation in an enlarged crop, similar to how cows digest grass, earning it the nickname 'stinkbird.' Most remarkably, hoatzin chicks have functional claws on two of their wing digits, which they use to climb back to the nest if they fall into water.