High Quality Content by WIKIPEDIA articles! The wildlife of Brazil is all the natural flora and fauna in the South American country. Home to 60% of the Amazon Rainforest, which contains more than one-third of all species in the world, Brazil is considered to have the greatest biodiversity of any country on the planet. It has the most known species of plants (55,000), freshwater fish (3000) and mammals (over 520). It also ranks third on the list of countries with the most number of bird species (1622) and fifth with the most reptile species (468).Approximately two-thirds of all species worldwide are found in tropical areas, often coinciding with developing countries such as Brazil. Brazil is second only to Indonesia as the country with the most endemic species.