What Am I.

lots of animals live in me,

I am in Brazil,

I am half land half river,

prahnas live in the river part,

I am

5,500,000 km2,

I have big tree canopees,

New animals are being discovered all the time,

I am at least 55 million years old,

Animals such as parrots,snakes,leapords and many more all live in me.

What am I!