crocodile are the one of the most dangerous and very lovely creature in zoo of nepal.many people lokk it in zoo.it sometimes moves in water and sometimes it comes out of water to sun bath.
Contrary Crocodiles are the largest surviving species of the vertebrate class Reptilia, and are one of the last living links with the age of the dinosaur. Most taxonomists divide the present-day crocodiles into three families: alligators and caimans (Alligatoridae), found primarily in the subtropics of the Americas; true crocodiles (Crocodylidae), found throughout the tropical regions of the world; and gharials (Gavialidae), found only in southern Asia. In total, there are 21 known species in existence today. Except for one saltwater species, croc Like all reptiles, crocodiles breathe air and are poikilothermic (having a body temperature that varies with the temperature of its surroundings). They are basically nocturnal animals; during the day they tend to lie in the sun on land, periodically withdrawing to the water or to shaded areas to avoid overheating. With the onset of darkness they become more active and spend nearly all of their time in the water. The eyes, the nostrils and the ear openings are the highest parts of the upper side of the head and thus remain above the water surface even when the rest of the crocodile is submerged.
All crocodiles reproduce by means of white, hard-shelled eggs. Depending on the species, the female excavates a nest in the sand or prepares a mounded nest of vegetation and deposits a clutch of 20-70 eggs once a year. A mother crocodile may guard her nest devotedly against predators, but she does not incubate in the sense of providing extra warmth. After an incubation period of 60 to 90 days, the baby crocodiles are ready to hatch and from inside the eggs they begin to make squeaking sounds that can be heard even though a crust of earth 30 cm deep, at a distance as great as 4 m. The young crocodiles grow rapidly, increasing in length by an average of nearly 30 cm per year.
Sexual maturity is reached at an age of approximately 8-10 years, after which growth slows but continues throughout the life cycle. The maximum possible length or age is not known but crocodiles have lived in captivity for more than 50 years, and many examples have reached lengths of more than 6 m.
odiles live mainly in freshwater swamps, lakes and rivers.
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