Capybara

The capybara is considered the largest rodent and we have plenty of these native from South America mammals. They are related to the guinea pigs and rock cavies. They are easily spotted near water as they are semi-acquatic and animals and although you can find individual capybaras scattered around, they are highly social and live in large herds.
They have a life span of 8-10 years and the largest specimen was spotted in Uruguay.
Male and females can be easily identificated as the male has a gland on its nose in order to mark its territory.
The capybara seen in the pictures is a male as its nose gland can be easily seen (the sort of black pertuberance rising in the middle of its nose which secretes a white liquid).