The Yacare caiman (Caiman yacare, jacaré in Portuguese) is a species of caiman found in central South America, including northeastern Argentina, Uruguay, southeastern Peru, eastern Bolivia, central/south-west Brazil, and the rivers of Paraguay. Approximately 10 million individual Yacare Caiman exist within the Brazilian Pantanal, representing what is quite possibly the largest single crocodilian population on Earth. As a medium-small sized crocodilian, most adult male individuals grow to roughly 2 or 2.5 m (6.6 or 8.20 ft) in length, with the occasional 3 m (9.8 ft) individual (there are reports of occasional 4 m (13 ft) individuals within the Pantanal, but this is yet to be verified). Females are rather smaller at an average of 1.4 m (4.6 ft). Body mass in this species can range up to 58 kg (128 lb) in males and from 14 to 23 kg (31 to 51 lb) in females. Their relatively smaller size makes them a potential prey of the jaguar and anaconda. This species diet consists primarily of fish (especially piranha) and birds, with the occasional capybara being taken by larger adults. In general, due to their small size, this species of caiman is not considered as a fatally dangerous species to humans.
^Crocodile Specialist Group (2008). Caiman yacare. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 17 August 2009. Database entry includes a brief justification of why this species is of Lower Risk/least concern.