Alligators can withstand cold better than crocodiles. American Alligators are the best vocalizers of the crocodilians. Adults have a throaty, bellowing roar with great carrying power. When alligators congregate in breeding groups in early spring, bellowing choruses can last from ten minutes to half an hour. Low growls are used during aggressive interactions.
All sizes hiss when approached by an intruder.
Female grunts like a pig in calling her young. Hatchlings and juveniles use a variety of grunts in many social situations. Muscles that close jaws are very strong, but once shut a man can easily hold them closed with his bare hands. Alligators are grown on ranches in the U.S. as a commercial venture. Crocodilians have had little competition in their niche as amphibious predator and have had 200 million years of success.