Alligators are capable of communication.

They are vocal animals that growl, yelp, hiss, bellow, and head slap the water to get their point across. Alligators are considered the most vocal of all crocodilians as they begin chirping before they even hatch. To lure females, male will produce infrasonic vibrations below the water, pulses that can travel a remarkable distance (in the picture below, you can see the water rippling along his back). To avoid fighting and potential injury, males settle most disputes by head-slapping the water, marking their territory. Because of their ability to communicate, large groups of alligators will sometimes share the same territory, using their own language to sort out the hierarchy.