Crocodiles make sounds – Ambientum Portal Lider Medioambiente


Reptiles – from Latin reptiles, which crawls – are vertebrate animals whose skin is covered with scales and whose ancestors appeared about 315 million years ago, during the Carboniferous. Most lineages diversified during the Mesozoic. All reptiles are oviparous and inhabit all continents except Antarctica. Like other animals, they make sounds to communicate with each other. Now, if the lion roars, the elephant cheats, the owl hoots and the donkey brays, what is the name of the sound that, for example, crocodiles make? Hissing.

Crocodiles: SOS addressed to mothers

And it is that the crocodiles (crocodile), although they are almost always silent, they utter grunts and cries of distress. They are considered by scientists to be the most vocalizing reptiles, being able to emit up to twenty different sounds.

The most unusual euphonies are those emitted by hatchlings while they are still squatting inside the egg. These are sounds that resemble the bursts of a laser gun and remind us of the cries of a baby. For a long time, the biological value of this type of sound was unknown until a study by scientist Amélie Verge, of the Jean Vergne University in Saint-Etienne, in central France, provided a source of light.

The research was carried out at the Pierelatte farm, in the Gallic region of Rhône-Alpes. There, Verge placed in incubators the eggs of ten crocodiles that had been laid about three months earlier. He recorded the cries emitted by the hatchlings and, some time later, played them on loudspeakers hidden under the sand, which attracted the attention of the females who began to search for the eggs with enormous frenzy. With this study, the researcher concluded that, in a certain way, the puppies warn the mother with their cries that they are about to hatch, to which they react by seeking them out and digging them up to help them get out. .

vocalizing lizards

Crocodiles aren’t the only reptiles that make sounds, just like geckos, small mostly carnivorous lizards of the infraorder geckota and that inhabit warm climates around the world.

We know that these reptiles produce an enormous amount of chirps, clicks and squeals called “barks”. On many occasions, these sounds – sometimes seductive and other times more akin to calls – are a territorial or courtship display, which serves to attract the attention of females and males.

Other reptiles that also communicate audibly are the Lizards, harmless reptiles belonging to the order Squamates They emit a kind of hissing sound to scare away potential predators. They achieve this by opening their mouths exaggeratedly and expelling air from the lungs through the glottis.

Scientists have verified that the lizard’s language is extremely complex and follows a series of “grammatical rules”. Thus, they were able to verify that it is composed of three components, which include the movement of the head, the flexion of the chest and the movement of the legs. Associating each of these actions with the different sounds the lizard can make opens up a wide range of possibilities.

And the gecko growls

Common geckos also belong to the order Scaly (Squamates) and are nocturnal and crepuscularly active geckos. These reptiles spend most of the day hidden from prying eyes, becoming active as the sun sets. One of their lesser-known peculiarities is their ability to emit a wide repertoire of sounds that they use to defend themselves from their predators and to communicate with their peers. In males, up to eleven repeats have been identified, while females usually emit only one call, which usually occurs during the mating season.

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