HOATZINS: The chicken-sized hoatzin (pronounced "Watson") is striking with its beady red eyes and blue "eyeliner. " However, this exotic bird is sometimes called "stink bird" because of its manure-like odour. Unlike most other plant-eating birds, the hoatzin boasts a cow-like gut which allows it to digest much of the plant fibre in its diet. © Carrie Vonderhaar, Ocean Futures Society/KQED