write about crocodiles
Answers
Answer:
Crocodiles (subfamily Crocodylinae) or true crocodiles are large semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia. Crocodylinae, all of whose members are considered true crocodiles, is classified as a biological subfamily. A broader sense of the term crocodile, Crocodylidae that includes Tomistoma, is not used in this article. The term crocodile here applies to only the species within the subfamily of Crocodylinae. The term is sometimes used even more loosely to include all extant members of the order Crocodilia, which includes the alligators and caimans (family Alligatoridae), the gharial and false gharial (family Gavialidae), and all other living and fossil Crocodylomorpha.
Crocodiles
Temporal range: Eocene – Holocene, 55–0 Ma
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Nile crocodile head.jpg
Nile crocodile (Crocodylus niloticus)
Pangil Crocodile Park Davao City.jpg
Saltwater crocodile (Crocodylus porosus)
Scientific classificatione
Kingdom:
Animalia
Phylum:
Chordata
Class:
Reptilia
Order:
Crocodilia
Family:
Crocodylidae
Subfamily:
Crocodylinae
Cuvier, 1807
Type species
Crocodylus niloticus
Laurenti, 1768
Genera
† Aldabrachampsus
† Brochuchus
Crocodylus
† Euthecodon
Mecistops (proposed)
Osteolaemus
† Rimasuchus
† Voay
Although they appear similar, crocodiles, alligators and the gharial belong to separate biological families. The gharial, with its narrow snout, is easier to distinguish, while morphological differences are more difficult to spot in crocodiles and alligators. The most obvious external differences are visible in the head, with crocodiles having narrower and longer heads, with a more V-shaped than a U-shaped snout compared to alligators and caimans. Another obvious trait is that the upper and lower jaws of the crocodiles are the same width, and the teeth in the lower jaw fall along the edge or outside the upper jaw when the mouth is closed; therefore, all teeth are visible, unlike an alligator, which possesses in the upper jaw small depressions into which the lower teeth fit. Also, when the crocodile's mouth is closed, the large fourth tooth in the lower jaw fits into a constriction in the upper jaw. For hard-to-distinguish specimens, the protruding tooth is the most reliable feature to define the species' family.[1] Crocodiles have more webbing on the toes of the hind feet and can better tolerate saltwater due to specialized salt glands for filtering out salt, which are present, but non-functioning, in alligators. Another trait that separates crocodiles from other crocodilians is their much higher levels of aggression.[2]
Crocodile size, morphology, behaviour and ecology differ somewhat among species. However, they have many similarities in these areas as well. All crocodiles are semiaquatic and tend to congregate in freshwater habitats such as rivers, lakes, wetlands and sometimes in brackish water and saltwater. They are carnivorous animals, feeding mostly on vertebrates such as fish, reptiles, birds and mammals, and sometimes on invertebrates such as molluscs and crustaceans, depending on species and age. All crocodiles are tropical species that, unlike alligators, are very sensitive to cold. They separated from other crocodilians during the Eocene epoch, about 55 million years ago.[3] Many species are at the risk of extinction, some being classified as critically endangered.
Answer:
Crocodiles have sharp teeth and have the strongest bite of any animal in the world. Even though the crocodile has a strong bite, the muscles that open their jaws are not that powerful and a reasonably strong human could hold their jaw closed with their bare hands. Crocodiles can survive for a long time without food.
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