 The area is considered the “most important bird area” because 392 species of birds have been identified in the reserve, including the campana bird (bell bird, the national bird of Paraguay) and the chopí saiyú.The park is also the only place in Paraguay where there have been sightings of the “morena” eagle or “harpía”, maracaná, red and blue parrot, yacutinga, yellow toucan and golden woodpecker, among others.Among the mammals that live in the region are the puma (a endangered species), tapir and jaguar yvyguy, the only south-American canine animal that hunts in packs.