Communication and Perception
American crocodiles communicate through vocalizations. Roaring acts to defend territory and attract mates. Territorial communication is also displayed through slapping the water with the head and tail. Infrasonic sound is also used which creates ripples on the water's surface. This infrasonic rumbling is used during the mating season to court potential mates. Young American crocodiles communicate to the mother when hatching time approaches. Newly hatched young emit distress calls eliciting protective measures from the mother. The position of the body is also used to indicate dominance or submission. Dominant males swim along the surface of the water, exposing their entire body, while females and submissive males only expose their head or snout while swimming. Tail-thrashing is also used in aggressive behaviors and interactions as a visual cue. Finally, chemosensory cues are used in communication, but have been poorly documented.
Communication Channels: visual ; tactile ; acoustic ; chemical
Other Communication Modes: pheromones
Perception Channels: visual ; tactile ; acoustic ; chemical