The shaggy, chicken-sized hoatzin birds live in tropical forests in the northern part of South America. They have long tails and rounded wings. Their face has no feathers but the skin is blue.

The bird kingdom is filled with intriguing mysteries, from the oldest birds that defy ageing myths to birds who have an ...

Bird Flu Raced Through South America. Antarctica Could Be Next. More than 100 million birds breed in the region, and many are likely to be vulnerable to the virus, scientists warned.