Do alligators make noise, like a growl or a hiss?

I have heard them hiss and make grunting sounds when we visited Florida, so yes, they do. read more

Alligators can make too main loud noises. They are capable of a loud hiss, usually this is a defensive warning, if you press it further it will either attack or run. The fun one though is the bellow. read more

A.Sanichar has a video with the boom recorded — ignore the tenor “faaaaaa” that sounds human, that's a recording artifact. The low boom and the water disturbance is the sound of a bull gator calling a female. Alligators boom in B flat, and booming choruses can be induced by tuba players, sonic booms, and large aircraft. read more

Alligators growl (actually, bellow) during breeding season, and only the males do it. They bellow to attract mates and warn off other males. Alligators typically hiss when frightened or annoyed. read more