Orinoco in the context of "Hectare"

The Ortoiroid people were the second wave of settlers of the Caribbean who began their migration into the Antilles around 2000 BC. They were preceded by the Casimiroid peoples (~4190-2165 BC). They are believed to have originated in the Orinoco valley in South America, migrating to the Antilles from Trinidad and Tobago to Puerto Rico. The name "Ortoiroid" comes from Ortoire, a shell midden site in southeast Trinidad. They have also been called Banwaroid, after another archaeological site in Trinidad.

Friedrich Wilhelm Heinrich Alexander von Humboldt (14 September 1769 – 6 May 1859) was a German polymath, geographer, naturalist, explorer, and proponent of Romantic philosophy and science. He was the younger brother of the Prussian minister, philosopher, and linguist Wilhelm von Humboldt (1767–1835). Humboldt's quantitative work on botanical geography laid the foundation for the field of biogeography, while his advocacy of long-term systematic geophysical measurement pioneered modern geomagnetic and meteorological monitoring. Humboldt and Carl Ritter are both regarded as the founders of modern geography as they established it as an independent scientific discipline.

Between 1799 and 1804, Humboldt travelled extensively in the Americas, exploring and describing them for the first time from a non-Spanish European scientific point of view. On these travels, along with French explorer Aimé Bonpland, he traversed thousands of miles through some of the most difficult and little-known places on Earth, to include identifying the source of the Orinoco River and in 1802 climbing the highest mountain in Ecuador to a height of 19,286 feet, at the time a world record altitude for a Westerner. His description of the journey was written up and published in several volumes over 21 years.

The Essequibo River (Spanish: Río Esequibo; originally called by Alonso de Ojeda; Río Dulce) is the largest river in Guyana, and the largest river between the Orinoco and Amazon. Rising in the Acarai Mountains near the Brazil–Guyana border, the Essequibo flows to the north for 1,014 km (630 mi) through forest and savanna into the Atlantic Ocean. It has a total drainage basin of 156,828 km (60,552 sq mi) and an average discharge of 154 to 178 km³/year.

Territory near the river is argued over by Venezuela and Guyana. The river is administered by Guyana after being previously colonized by the British. Historically, Venezuela has claimed the Essequibo River as their most eastern border, though in practice it was under Dutch control.

The Dutch began their colonisation of the Guianas, the coastal region between the Orinoco and Amazon rivers in South America, in the late 16th century. The Dutch originally claimed all of Guiana (also called De wilde kust, the "Wild Coast") but—following attempts to sell it first to Bavaria and then to Hanau and the loss of sections to Portugal, Britain, and France—the section actually settled and controlled by the Netherlands became known as Dutch Guiana (Dutch: Nederlands-Guiana).

The Amazon river dolphin (Inia geoffrensis), also known as the boto, bufeo or pink river dolphin, is a species of toothed whale endemic to South America and is classified in the family Iniidae. Three subspecies are currently recognized: I. g. geoffrensis (Amazon river dolphin), I. g. boliviensis (Bolivian river dolphin) and I. g. humboldtiana (Orinoco river dolphin). The position of the Araguaian river dolphin (I. araguaiaensis) within the clade is still unclear. The three subspecies are distributed in the Amazon basin, the upper Madeira River in Bolivia, and the Orinoco basin, respectively.

The Amazon river dolphin is the largest species of river dolphin, with many adult males reaching 185 kilograms (408 lb) in weight, and 2.5 metres (8.2 ft) in length. Adults acquire a pink color, more prominent in males, giving it its nickname "pink river dolphin". Sexual dimorphism is very evident, with males measuring 16% longer and weighing 55% more than females. Like other toothed whales, they have a melon, an organ that is used for bio sonar. The dorsal fin, although short in height, is regarded as long, and the pectoral fins are also large. The fin size, unfused vertebrae, and its relative size allow for improved maneuverability when navigating flooded forests and capturing prey.

Brachyplatystoma filamentosum, commonly called piraíba, kumakuma, valentón or laulau, and Goliath Catfish is a species of catfish in the family Pimelodidae which is native to the Amazon and Orinoco River basins, rivers of the Guianas and North-eastern Brazil. It is an important predator in its ecosystem, and in turn is a food fish.

Guajiboan (also Guahiban, Wahívoan, Guahiboan) is a language family spoken in the Orinoco River region in eastern Colombia and southwestern Venezuela, a savanna region known as the Llanos.

The Piaroa–Saliban, also known as Saliban (in spanish : Sálivan), are a small proposed language family of the middle Orinoco Basin, which forms an independent island within an area of Venezuela and Colombia (northern llanos) dominated by peoples of Carib and Arawakan affiliation.

Betoi may be related.

Guainía (Spanish pronunciation: [ɡwajˈni.a]; Yuri language: "Land of many waters") is a department of Eastern Colombia. It is in the east of the country, bordering Venezuela and Brazil. Its capital is Inírida. In 1963 Guainía was split off from Vaupés department. The northern part and the Inírida River are included in the Orinoco basin; the rest is part of the Amazon basin. The Guaviare River is the main area of colonization; many colonos come from the Colombian Andean zone, most of them from Boyacá. They are followed by the llaneros, people from the Eastern plains (Llanos). The population is mainly composed of Amerindians, and the largest ethnic groups are the Puinaves (from the makú-puinave family) and the Curripacos (from the Arawak family). There are a total of 24 ethnic groups in the department; many of them speak four Indigenous languages besides Spanish and Portuguese.