Scientists in Brazil have discovered the first new species of river dolphin since 1918. The new species known as, Inia araguaiaensis, can mostly be found in a 932 mile stretch of the Araguaia-Tocantins River system in Brazil.
The Giant River Otter was listed as endangered in 1999 and wild population estimates are typically below 5,000. It is one of the most endangered mammal species in the neotropics. Habitat degradation and loss is the greatest current threat.