.nu

Skolarbeten och uppsatser från högstadiet och gymnasiet
Sök skolarbeten

Crocodiles

Ämne: Engelska
| Mer

Some of the members in the crocodile family is the largets living reptile today. The greatest of all crocodiles is the saltwater crocodile wich can reach a lenght of around 7m and weight about 1000kg. But there is unconfirmed reports of some individuals up to 9 meters.

Where do they live?

Crocodiles is anphibians wich means that they live both inwater and on land. But crocodiles can not breathe under water even tough they are amphibians. That is the reason why they keep their nose up over the water when they swim. Most of the crocodiles lives in freshwater areas like lakes,rivers and ponds. But some spieces lives in saltwater. Most of the crocodiles is comfortable in slow flowing rivers but a few spieces likes faster flowing rivers.

How do they advance?

Crocodiles can advance in three different ways. The first way is that they go upstrait and with their tail held over the ground. Another way they can move is when they run. Crocodiles is very clumsy on land and when they run they often stumble and lose their balance. The third way they can move is by crawling. They often crawl when they wish to surprise a prey. When they crawl they can glide into the water without almost any sound at all.

What do they eat?

Crocodiles eats insects, frogs, spiders, shellfishs, snails, birds, fishs other reptiles and mammals. But exatly what they eat depends on where they live, how old it is and what kind of art it belongs to. The new-born kids eat mostely insects but when they grow older they start catching more and more larger animals.

How do they catch their preys?

Crocodiles is avery smart reptile and does not swim around and seek for food and waste energy. Insted they just hide somewhere and wait for their prey to swim by. When crocodiles hunt they often return to a place where they had caught food another time before. A crocodile wich just lays under the water surface can quick jump up from the water and catch a animal wich is about to drink. If needed crocodiles can jump several meters up in the air. They for example jump when they is about to catch a flying bird in the air or if they want to catch a bird or another animal is climbing in a tree hanging over the water. If a fish shoal is swimming next to an creek a couple of crocodiles can hunt together and force the fishs against the beach in the creek and catch them. When they had caught a fish they bring them up on land where the fishs quickly dies. When the crocodiles hunt tigether they are not violent to each other. Many crocodiles can share a to great prey to just one crocodile. For example a zebra can not just onecrocodiles kill by itself so other crocodiles can come to help. When they had kill they zebra the also share the zebra between them. They form a circle around their prey and takes a few bites each and then they to swallow and melt the meat pice.

How often do they eat?

Many of the crocodiles wich has been caught has a empty stomach. There are some scientist thant think that the new-born crocodiles can live without food for about four months. They also think that one adult crocodile can live up to two years without any food at all. But most of the crocodiles eats for about once a week. During the winter they almost does not eat anything because in the winter they are half asleep.

How do they melt their food?

Crocodiles has two stomachs. One is named the muscle stomach and contains swallowd stones wich helps to mince its food. After it has been minced it goes over to the glundular stomach (körtel magen) where the food melts with help of stomach acidity. Crocodiles has more stomach acidity than other animals wich help the crocodile to melt the food faster and even melt down the animal bones. Almost all the fat they get from the food they store in its tail and along its back. Crocodiles is very lazy animals and likes to live on the fat they got in their fat storage. That is the reason why crocodiles always move slow and dislike to move fast. They also grow very slow because they don´t eat very often.

What happends if they lose a Tooth?

If a crocodile lose a tooth somehow, it fastly grows out a new tooth. It happends quite often to crocodiles because when they clapps their jaws together over a prey they sometimes bite in something hard.

True or false?

Many people claim that crocodiles cath thier preys and then hides its prey on the bottom and then come back a few days after to eat it up. But that is not true, Crocodiles does not come back after hiding it but it can happend if a crocodiles has caught a to large prey to eat in just one day. If that happends the crocodile can come back a few days after to eat up what is left.

Fact sourses

1. I have only used one book named KROKODILER that book is in swedish and can be find in the Gunnesbo library.

Summary

Crcodiles is the largest living reptile today. It can grow 9 meters long and can weight ocer 1000kg. Crocodiles is amphibians wich means that they live both on land and in water. Crocodiles lives in freshwaterareas like lakes, rivers and ponds. But there are some spieces that lives in saltwater, also in the sea.

Crocodiles, 3.0 out of 5 based on 5 ratings
| Mer
Betygsätt Crocodiles


Relaterade skolarbeten
Nedanstående är skolarbeten som handlar om Crocodiles eller som på något sätt är relaterade med Crocodiles.

Kommentera Crocodiles

« | »