Sprawling 5.5 million square kilometres, the Amazon rainforest is the largest of its kind and home to about one in ten of all known species. To date, at least 40,000 plants, 2,200 fish, 1,200 birds, 400 mammals, 400 amphibians, and 375 reptiles have been scientifically classified in the region, not to mention nearly 2.5 million insect species.

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