How Will the Polar Vortex Affect Wildlife? » FL090821_D022

Manatees require warm springs to get through cold spells. Photo: John Winfree/TNC

Manatees require warm springs to get through cold spells. Photo: John Winfree/TNC

(ALL RIGHTS) Manatees at Blue Springs State Park in Florida. Photo credit: © John Winfree/TNC


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