2 panthers being tracked in northeast after storm knocks enclosure fence down YULEE, Fla. - Two young panthers are being tracked in northeast Florida after Hurricane Sandy knocked down the enclosure fence where they were being raised. A statement from the Florida Fish and Wildlife Conservation Commission says the juvenile panthers, outfitted with radio collars, are being tracked in Yulee in Nassau County. Both are out of their pen but have been located by wildlife officials and the U.S. Fish and Wildlife Service using telemetry to track the radio-collars on the panthers. The cats have not traveled far from their pen. Officials are working diligently to return them to their enclosure. The cats were captured when they were 5 months old in northern Collier County last September. Scientists estimate that between 100 and 160 adult and sub-adult panthers live in South Florida.