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Bolivian river dolphin
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Map of northern South America showing the distribution ranges of three river dolphin species. The Amazon River dolphin range is shaded green, covering much of the Amazon basin across Brazil, Peru, Ecuador, and Colombia. The Orinoco River dolphin range is shown in yellow, limited to the Orinoco basin in Venezuela and Colombia. The Bolivian river dolphin range is marked in purple within central Bolivia. The Araguaian boto's range is shown in orange along the Araguaia and Tocantins rivers in Brazil
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Bolivian river dolphin

mammal
Also known as: Inia boliviensis
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Map of northern South America showing the distribution ranges of three river dolphin species. The Amazon River dolphin range is shaded green, covering much of the Amazon basin across Brazil, Peru, Ecuador, and Colombia. The Orinoco River dolphin range is shown in yellow, limited to the Orinoco basin in Venezuela and Colombia. The Bolivian river dolphin range is marked in purple within central Bolivia. The Araguaian boto's range is shown in orange along the Araguaia and Tocantins rivers in Brazil
South American river dolphin Map of the geographic home ranges of three South American river dolphin species.

The Bolivian river dolphin (Inia boliviensis) is a species of freshwater dolphin found in remote streams of the Bolivian Amazon. It is a mammal related to whales and is distinguished by its long beak and rounded forehead, differing from more common dolphin species.12

These dolphins are not as agile as other dolphins and spend much of their time at river bottoms, using their sensitive snouts and sonar to find food in murky waters. The Bolivian river dolphin is slightly smaller than the Amazon river dolphin and has grayish-pink skin. Population estimates suggest there may be as many as 25,000 individuals.1

River dolphins, in general, are often curious and friendly toward humans. However, several species, including the Ganges and Indus river dolphins, are endangered due to factors like industrial river traffic, hunting, and dam construction.13

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