The Keys are also home to unique animal species, including the Key deer, protected by the National Key Deer Refuge, the American crocodile, and the Key Largo woodrat.
It is home to a wildlife preserve, helping the population of the American crocodile.
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It is a saline lake with a higher concentration of salt than the sea water and harbors numerous fauna such as American Crocodiles and American Flamingos.
Predation by feral tegus may pose a threat to Florida's endangered wildlife, such as the Key Largo woodrat and the American Crocodile.