The Florida panther is a North American cougar (P. c. couguar) population in South Florida. It lives in pinelands, tropical hardwood hammocks, and mixed freshwater swamp forests. It is known under a number of common names including Florida cougar, and Florida puma. Males can weigh up to and live within a range that includes the Big Cypress National Preserve, Everglades National Park, the Florida Panther National Wildlife Refuge, Picayune Strand State Forest, as well as rural communities in the counties of Collier, Hendry, Lee, Miami-Dade, and Monroe. It is the only confirmed cougar population in the Eastern United States, and currently occupies 5% of its historic range. In the 1970s, an estimated 20 Florida panthers remained in the wild, but their numbers had increased to an estimated 230 by 2017. In 1982, the Florida panther was chosen as the Florida state animal. Florida panthers are spotted at birth, and typically have blue eyes. As the panther grows, the spots fade and the coat becomes completely tan, while the eyes typically take on a yellow hue. The panther's underbelly is a creamy white, and it has black tips on the tail and ears. Florida panthers lack the ability to roar, and instead make distinct sounds that include whistles, chirps, growls, hisses, and purrs. Florida panthers are average-sized for the species, being smaller than cougars from colder climates, but larger than cougars from the Neotropics. Adult female Florida panthers weigh , whereas the larger males weigh . Total length is from and shoulder height is . Male panthers, on average, are 9.4% longer and 33.2% heavier than females because males grow at a faster rate than females and for a longer time. It was described as a distinct cougar subspecies (Puma concolor coryi) in the late 19th century. The Florida panther had for a long time been considered a unique cougar subspecies, with the scientific name Felis concolor coryi proposed by Outram Bangs in 1899. A genetic study of cougar mitochondrial DNA showed that many of the purported cougar subspecies described in the 19th century are too similar to be recognized as distinct.