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/southwest Brazil, and the rivers of Paraguay. About 10 million individual Yacare caimans exist within the Brazilian pantanal, representing what is quite possibly the largest single crocodilian population on Earth.
As a medium to small to mid-sized crocodilian, most adult males grow to roughly 2 or 2.5 m (6.6 or 8.2 ft) in length, with the occasional 3 m (9.8 ft) individual (reports of 4 m (13 ft) individuals within the pantanal are 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 a small sized individual makes a potential prey of the jaguar and anaconda.
This species' diet consists primarily of fish (especially piranha) and birds,retiles,small mammals. with the occasional large mammals (especially capybara) being taken by larger adults. In general, due to their size, this species is not considered to be fatally dangerous 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.