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There are millions of crocodiles there. There used to only be 1 per square metre. Now there's like 10 per square metre in a Lake that is km x 40km m x m.


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I've seen on other videos that another differences is how they open the jaws to caught prey. One open the upper jaw while the other open the lower jaw. Is this true and which is which? My 5 years old daughter easy spots differences: Today in another Zoo again she didn't miss and I wanted to cry beeing such stupud - thx for the lecture! I was left a little confused. The article seems to contradict itself several times, sometimes within one sentence.

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Here we have a good explanation. In fact, many people confuse crocodiles, alligators and caimans. I do admire those who came before us and who without technology such as night vision video recorders, nor cameras nor guns were able to observe animals as they grazed, fed and protected their young. Thanks once again for throwing more light on the Alligator and Crocodile. I wonder which of the two would sleep with mouth open without fear of its tongue being a meal for another? These are two animals that terrorize others in the waters!

All the more reason to avoid an alligator. I think it's still best to be wary of them, as they have a bonecrushing bite! I always wondered what the difference was! If I see either one,though, I'm running away! Although here in New York.. I love watching them in the Everglades, which is the only place in the world where alligators and crocodiles coexist. Now about the turtles Thank you very much for your kind words and the podcast feature, Simone.

I am honored by your interest in my work! I just wanted to say that the HP Staff and I loved this post so much, we featured it in a podcast to discuss it and introduce it to more people! You can find the podcast here: Amazing creatures, thanks for the clarification Other product and company names shown may be trademarks of their respective owners. HubPages and Hubbers authors may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others. To provide a better website experience, owlcation.

Please choose which areas of our service you consent to our doing so. For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: Shape of the snout. The crocodile's snout is pointed and V-shaped, and the alligator's is wide and U-shaped.

Alligators are only found in parts of the US and China, whereas crocodiles can be found across the world. Scroll down for more information about where you'll find each. Crocodiles prefer water that is more saline or salty than the alligator's preferred freshwater habitat. Crocodiles can't hide their teeth, but alligators' teeth are sometimes hidden when their mouths are closed. A full-grown crocodile will likely be several feet longer than an adult alligator. Crocodiles are generally lighter in color than alligators. On land and in water, crocodiles are usually slower than alligators.

In terms of aggression, an alligator might seem tame compared to a crocodile. Alligators and Crocodiles Have Different Snouts One of the main differences between alligators and crocodiles is the snout. Where Do Alligators and Crocodiles Live? Color Differences Crocodile hides tend to be more of a light tan or olive color, whereas alligators are usually a dark blackish grey. Which Runs and Swims Faster: An Alligator or a Crocodile? Which Is More Aggressive: Are alligators and crocodiles the same species? If they fought, who would win?

Crocodiles can grow bigger than gators, and their bites can be more lethal. Which are more dangerous to humans? Gatorade was developed at the Crocodiles are less able to Do all American alligators have the same dark blackish color? Why do alligators swim away when humans approach? Can an alligator and a crocodile have kids together? In which climate are crocodiles and alligators most often found? They are most often found in tropical and subtropical climates.

Alligators were put the No, they are wild animals who generally see humans as a threat. It used to be possible to buy cowboy boots made from alligator leather, is this still true? Do you know the difference between a freshwater crocodile and a saltwater crocodile? What is there for tourists to see and do in the Philippines? Between an alligator and a crocodile of the same size, whose bite is stronger?

Which has the stronger bite; an alligator or a crocodile? Do crocodile and alligator jaws open in different ways or does the same part of the jaw open? So the creatures in the Amazon River are alligators? Are alligators more aggressive than crocodiles? Are caimans a species of alligator or they are a different species? Who would win in a fight between an alligator or crocodile? Thank you so much u helped with a merit badge in boy scouts I loved your article! HI I give thanks for this helpful article. It is a wonderful website which teaches us about animals. I'm proud of this website.

Used this to do a speech in my college class, was very helpful thanks dude. I 've some doubts about them that were cleared now. Thanks for this information because I really need this information for my studies. That was very informative! See a pointy nose and teeth Alligators are not so wild as crocs.

For me both are charming, well I won't dare to get closer to them: Thank you for pointing out the video problem, Will. I have now replaced it! Your second vid comes up as 'private' which is a shame- the first one was great. I enjoyed the rest of the page, too. Props on the fantastic Hub! Well this clears up any confusion! Glands in the mandible and cloaca excrete oily chemicals that have a poorly understood function in communication. The crocodilian brain is relatively tiny compared with the size of the body; the brain of an alligator that is 4 metres 13 feet long weighs only 11 grams 0.

Nevertheless, crocodiles are capable of complex behaviours. They are often curious and show evidence of rapid learning. Captive individuals of some species are known to recognize their keepers and show neither fear nor aggressiveness. These animals beg for food, and some even permit themselves to be petted. Crocodilian locomotion is the product of a unique body form. The lateral processes of the spine are joined to interlocking bony plates of the dorsal scales by complex ligaments.

This structure is rigid but flexible, and it allows an efficient transfer of energy from the tail when swimming and an erect body posture when walking. When swimming, the crocodile places its legs back against the sides of the body and moves forward by means of lateral wavelike motions of the tail. When walking on land, crocodiles hold themselves high on all four legs. The characteristic sinusoidal side-to-side flexure of the body is caused by the movement of a front leg in concert with the opposing hind leg during each step. A cantilevered tail also balances the body.

When moving quickly into the water from a bank, crocodiles slide on their bellies and push themselves forward with the feet. Crocodiles are also capable of galloping short distances. Crocodiles are sexually dimorphic, and adult males are larger than females. Copulation occurs in the water, and it is preceded by a complex courtship in which the animals signal each other using changes in body profile, touch, and vocalization.


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Chemical signals are probably also part of courtship. The male then mounts the back of the female, and both animals rotate their tails so that the respective cloacae are brought into contact and intromission of the male erectile organ is achieved. All crocodiles lay hard-shelled eggs, which may weigh 50— grams 0. A female lays an average of 12—48 eggs per nest , depending upon her age, size, and species.

Two general forms of nest building are known. Some species, such as the Nile crocodile C. Others, such as the estuarine or saltwater crocodile C. Egg incubation takes from 55 to days. As is the case for many other reptiles, the sex of the developing embryo is determined by the temperature of the incubating egg at a critical time, which is during the first half of its incubation period. Until hatching occurs, the female usually remains close to the nest to protect the eggs from predators.

After two or three months, the young are fully developed and ready to hatch. While still in the egg, the young may utter squeaks, perhaps signaling that they are ready to emerge. The adult female removes the dirt or other debris from the eggs and assists the hatchlings to the water. In many cases, the female opens the eggs carefully with her tongue and carries the hatchlings in her mouth. The female remains close to her offspring and provides protection from predators for several weeks to months.

As the young grow, they disperse, but they may remain near their nest site for over a year. In captivity, males have also been observed assisting in the hatching process and providing hatchling care. Crocodiles are inhabitants of swamps, lakes, and rivers, although some species make their way to brackish water or to the sea.

The estuarine or saltwater crocodile C. Glands in the tongue allow the excretion of excess salt. The smooth-fronted caiman Paleosuchus trigonatus of South America prefers rocky, fast-flowing rivers. In West Africa the dwarf crocodile Osteolaemus tetraspis is found principally in the rivers of the forest regions. Crocodiles may affect nutrient cycling, ecosystem function, and fisheries productivity in the areas they inhabit. The crocodilian form is adapted to an amphibious way of life. The body is elongated, and its long, muscular tail is well suited to rapid swimming.

The external nostril openings, the eyes, and the ear openings are the highest parts of the head. These important sense organs remain above the water surface even when the rest of the head and body are submerged. The two nostril openings are close together on a raised portion at the point of the muzzle. When the animal dives, these openings may be closed by membranous flaps to keep water out.

A long bone-enclosed nasal passage leads from the exterior nostril openings to the interior nostril openings, or choanae, located at the extreme posterior end of the palate; a membranous flap in front of the choanae constitutes the posterior closure of the mouth cavity.

So What's the Difference Between Alligators and Crocodiles?

As a result, the crocodile can breathe even if its mouth is open underwater. Like many nocturnal animals, crocodiles have eyes with vertical, slit-shaped pupils ; these narrow in bright light and widen in darkness, thus controlling the amount of light that enters. On the back wall of the eye, the tapetum lucidum reflects incoming light , thus utilizing the small amount of light available at night to best advantage. In addition to the protection provided by the upper and lower eyelids, the nictitating membrane that is, a thin, translucent eyelid may be drawn over the eye from the inner corner while the lids are open.

The delicate eyeball surface is thus protected under the water, while a certain degree of vision is still possible.

Crocodile Facts

Unlike the ears of other modern reptiles , those of the crocodile have a movable, external membranous flap that protects the ears from the water. The sense of smell is well developed and may even operate in the egg prior to hatching. The outer margin of the jaws in most species is irregular. Each jaw carries a row of conical teeth, which may number more than in species with very long muzzles. The teeth are held in sockets and replaced continuously; new teeth grow from below and force the older ones out.

The thick, fleshy tongue is firmly attached to the floor of the mouth, and it is nearly immobile.

Dangerous Dention

The posterior portion of the head forms a flat plate that is attached to a short, powerful neck. On the dorsal side of the neck are two groups of bony scales called scutes. Small postoccipital scutes are located just behind the head and are present in all crocodiles except the estuarine crocodile.

Behind the postoccipital scutes are the larger nuchal scutes, which in some species are connected to the adjacent horny plates of the back. The upper surfaces of the back and tail are covered with large, rectangular horny plates arranged regularly in longitudinal and transverse rows.

Crocodile - Wikipedia

Most of the dorsal plates have a longitudinal ridge, or keel. Under these plates lie bony structures called osteoderms of about the same size. This configuration occurs in all but one species; in the estuarine crocodile, the bony plates are smaller. The entire underside of the crocodile has a regular pattern of scales, which are smaller than those on the upper surface.

These scales are rectangular, entirely smooth, and contain little or no bone material. An exception to this condition occurs in caimans of the genera Melanosuchus , Caiman , and Paleosuchus , in which the surface plates on the lower side are also bony. The cloaca —a chamber containing the genital, anal, and urogenital openings—extends longitudinally within the body; it is surrounded by an oval area of small scales on the underside of the body. The cloacal vent is slightly posterior to the attachment of the hind legs at the base of the tail.

They don't cry because they feel sorry for the prey, but because they swallow too much air, which gets in touch with lachrymal glands glands that produce tears and forces tears to flow. They have one of the strongest bites in the animal world. Muscles which induce closing of the jaw are much stronger than muscles which open the jaw.

Because of that, people can use their bare hands to keep their mouth closed. Crocodiles can be often seen with their jaws wide open. They open their jaws to cool themselves because they don't have sweat glands. Only crocodile's belly has a gentle skin. Skin on their back contains bony structures called osteoderms which make skin bulletproof. Crocodiles have excellent eyesight especially during the night. Their eyes can be seen as red dots while peeking from the water during the night. Crocodiles and alligators are not the same.

Crocodiles are larger, have V-shaped jaw and some of their teeth can be seen even when the jaw is fully closed.