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...

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...

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...

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...

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 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...

tributaries to the Rio Madeira such as the Rio Beni and in Peru they were recovered from the Rio Ucayali and other tributaries to the Amazon. Some scientists...

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

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...

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

The Juruá River (Portuguese: Rio Juruá [ʒuɾuˈa]; Spanish: Río Yuruá) is a southern affluent river of the Amazon River west of the Purus River, sharing...

the Marañón River is generally thought to end at the confluence with the Ucayali River, after which most cartographers label the ensuing waterway the Amazon...

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...

for 724 km (450 mi) before coalescing with the Tambo River to form the Ucayali River. The Urubamba is divided into the Upper Urubamba and the Lower Urubamba...

and Rio de los Motilones. The Huallaga is born on the slopes of the Andes in central Peru and joins the Marañón before the latter reaches the Ucayali River...

discovered the Isthmus of Fitzcarrald, which was a portage route from the Ucayali River into the Madre de Dios River basin. Fitzcarrald became known as the...

also baptized their children. From the Río Tapiche Nieves and Manuel then moved to Áquano Isla on the Río Ucayali. They constructed a rustic home and began...

Phellinodes. The species is recorded from Costa Rica, San Antonio, Colombia, Rio Ucayali in eastern Peru. Adult male has greyish brown ground colour wings. Weakly...

del Río Ucayali, Loreto – Perú [Analysis of Traditional Knowledge of the Use of Plant Species in Three Communities of the Lower Basin of the Ucayali River...

Apurímac River, then the Ene River and Tambo River before its waters meet the Ucayali River which later forms the Amazon. At 11°09′39″S 74°14′48″W / 11.16083°S...

to the portions of the Amazon upstream of its confluence with the Rio Negro Ucayali - Peru Tambo - Peru Ene - Peru Mantaro - Peru Apurímac - Peru Urubamba...

The Rio Abiseo National Park (Spanish: Parque Nacional del Río Abiseo) is located in the San Martín department of Peru. UNESCO pronounced it as Natural...

The Ucayali moist forests (NT0174) is an ecoregion in the western Amazon rainforest of Peru. The Ucayali moist forest ecoregion is to the east of the Andes...

vulnerable to extinction: White bald-headed uakari, Cacajao calvus calvus Ucayali bald-headed uakari, Cacajao calvus ucayalii Red bald-headed uakari, Cacajao...

Ultimas exploraciones ordenadas por la Junta de Vías Fluviales a los ríos Ucayali, Madre de Dios, Paucartambo y Urubamba. Lima, Perú, Oficina Tipográfica...

along the rios Ucayali and Marañón to where their confluence creates the Amazon, and on the Amazon itself. From the south it occurs along the Rio Madeira...

records from the western Amazon, Caquetá, Madeira, Marañon, Putumayo and Ucayali systems. Adults mostly inhabit fast-flowing sections of whitewater rivers...

Macbride returned the following year to the Huánuco region and the Río Ucayali. For a decade from 1929, Macbride visited all the major herbaria of Europe...

The Javary River, Javari River or Yavarí River (Spanish: Río Yavarí; Portuguese: Rio Javari) is a 1,184 km (736 mi) tributary of the Amazon that forms...

eastern Peruvian regions of Loreto, Ucayali and Madre de Dios. Part of the limit was established in the Treaty of Rio de Janeiro in 1909. In 2013, the tenth...