The Ucayali River (Spanish: Río Ucayali, IPA: [ˈri.o wkaˈʝali]) is the main headstream of the Amazon River. It rises about 110 km (68 mi) north of Lake...

tributary of the Upper Amazon, a few miles from the confluence of the Río Ucayali. Established by Manuel Pacaya–Samiria, a leader of the Kokama people...

Huánuco region, where it inhabits the Río Aquas, the Río Amarillae, a tributary of the Río Pachitea, and the Río Ucayali river system. The species was first...

becomes the Ucayali, which is the main headstream of the Amazon. Sometimes the complete river from its source to its junction with the Ucayali, including...

The Amazon River (UK: /ˈæməzən/, US: /ˈæməzɒn/; Spanish: Río Amazonas, Portuguese: Rio Amazonas) in South America is the largest river by discharge volume...

The Purus River (Portuguese: Rio Purus; Spanish: Río Purús) is a tributary of the Amazon River in South America. Its drainage basin is 371,042 km2 (143...

tropics. Hypoptopoma bianale is native to South America, Rio Solimòes in Brazil and Río Ucayali in Peru. Hypoptopoma bianale is harmless to humans. Froese...

merging with the Urubamba River at the town of Atalaya, it becomes the Ucayali River. The Tambo is part of the headwaters of the Amazon River whose origin...

from Peru. The zebra oto was described in 2004 from a tributary of the Río Ucayali in Peru. Its closest relatives appear to be O. huaorani, O. bororo, O...

includes: the Upper Rio Jurua region in the southwest of Amazonas state and to the east of Acre state. In Peru, it inhabits the upper Rio Ucayali and Urubamba...