"Brazil is home to 60% of the Amazon Rainforest which hosts approximately one-tenth of all the species in the world. As such, the landscapes of Brazil have the most known species of plants (estimated at 55,000), the most species of freshwater fish (estimated at 3,000) and the most mammal species (estimated at over 689)."

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https://www.goway.com/travel-information/central-and-south-america/brazil/nature-and-wildlife/