 Over 400 species of birds have been identified in the park, the greatest number of any site in Paraguay.12 of the species are globally threatened, including the vinaceous-breasted amazon ("Amazona vinacea") and black-fronted piping guan ("Pipile jacutinga").The park holds important populations of helmeted woodpecker ("Celeus galeatus"), russet-winged spadebill ("Platyrinchus leucoryphus"), cock-tailed tyrant ("Alectrurus tricolor") and saffron-cowled blackbird ("Xanthopsar flavus").