hoatzin

noun1

1. •
   A bird of the species Opisthocomus hoazin of the order Opisthocomiformes, with claws on the wing fingers of the juvenile and an enlarged crop used as a rumen.

   • The hoatzin is a very colorful bird with a blue head, a tuft of feathers standing up on the head, and an orange iris in the eye. — 2006