Amazon River Dolphins
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The Amazon river dolphin (Inia geoffrensis), also known as the boto, bufeo or pink river dolphin, is a species of toothed whale classified in the family Iniidae. The Amazon river dolphin is the largest species of river dolphin, with 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". In 2008, this species was ranked by the International Union for Conservation of Nature (IUCN) as a Data Deficient, due to the uncertainty regarding their population trends and the impact of threats. While hunting is a major threat, in recent decades, greater impacts on population are due to the loss of habitat and changing environments. Hydrophone recording is a highly valuable noninvasive tool to monitor Amazon river dolphins.
