This is one of the many amazing works of the artist Osnaldo Oliveira. He lives in Garopaba, on coast of Santa Catarina, with his wife Eveline Klein, whose family left Santarem some 12 years ago.
Contact them for other pieces, this one is mine. Evelineklein@hotmail.com
By the way Hoatzin is one of the most representative birds of the Amazon avefauna, and it has been seen by many as the missing link to dinossaurs. Its also called stinking bird.