They have a four-chambered heart and well developed senses. On land, they normally crawl along on their bellies, but they can also “high walk” with their trunks raised above the ground like mammals.įrom the physiological point of view, crocodiles are the most advanced of all reptiles: their internal anatomy is similar to the bird’s. When the crocodile ambushes its prey, the only visible parts are nostrils, eyes and ears, the rest of the body remains concealed underwater.Ĭrocodiles have the richest vocal range of all reptiles, being capable of making roaring and yelling sounds, especially during the mating season. This is why keeping the crocodile’s mouth shut with the hands is very efficient. However, they are unable to open them with the same force. Crocodiles close their jaws with such enormous power, that they can even crush the bones of small mammals. This makes them different from alligators. These the teeth mostly interlock, but almost all of them stay on the outside of the mouth when closed. They have powerful jaws, with 30-40 teeth on each. A type of shell made of osseous plates covers their thick skin. They are perfectly adapted to predatory life. Occasionally, the may use their tail to capture prey, towing it from shallow into deep water, where they can devour it easily.Ĭrocodiles hardly have natural predators. They are good swimmers, moving ahead due to the rhythmic movements of their powerful tail. The modern crocodiles are amphibious and spend most of their time underwater. Unlike alligators, crocodiles live in the tropical and subtropical areas of the world. They used to live on the ground, but quickly divided into aquatic and amphibious variants. Their predecessors were of lighter stature than today’s crocodiles. They are supposed to be the vestiges of the big era of the reptiles. Nile Crocodiles are ancient reptiles that first appeared on the earth about 200 million years ago. Education program of biodiversity conservation.Services for schools and secondary schools on the island.Public educating about the conservation of wildlife and biodiversity.Our tribute to the canaries who founded San Antonio of Texas.Bibliography facts of Canarians in Texas.
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