Rio Negro, Major river system in northern South America.
Rio Negro is a river in northern South America that flows through Brazil, Colombia and Venezuela, measuring 2,250 kilometers (1,398 miles) long. Decaying plant material from the rainforest stains the water dark brown, giving it its defining appearance.
European explorers reached the river in the 16th century and soon established the first settlements along its banks. The name refers to the dark color of the water, which early travelers found particularly noticeable.
Villages along the river organize annual festivals where families gather to grill fish and play local music. Residents often bathe in the warmer shallows during late afternoon, while children play on wooden jetties.
Boats run regularly between settlements along the river, linking remote communities with larger towns such as Manaus. Travelers should bring insect repellent, as mosquitoes are common during morning and evening hours.
Near Manaus, the dark water of the Rio Negro flows beside the light brown water of the Solimões for several kilometers without the two rivers mixing. The different temperature and flow speed of the two currents prevent them from merging immediately.
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