Alligators did not welcome the recent spate of cold weather. The least-known aspect of alligator life history involves their behavior during the winter, especially in inland swamp habitat. In general, they retreat to dens in cold weather; but they do not hibernate. Instead, they brumate, a condition when the core temperature and other physiological processes decrease, but not to the extent that occurs in true hibernation.
Alligators and Cold Weather
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K. Ouchley