The park is also home to the Neblina uakari ("Cacajao hosomi"). Forest loss and hunting are the two most prominent threats to the bald uakari. The four species of uakari currently recognized are all found in the north-western Amazon basin. The black-headed uakari is found north of the Amazon and south of the Rio Negro. The rare red uakari monkeys ("Cacajao calvus") are found in the north in swamp forests.