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Essay on life of birds

essay on life of birds High School English essays: Next. Flying birds are all physically built for an active life. Birds play an important part in the life of man. Birds Essays: Over 180,000 Birds. Home » Essay » Birds 2. thus potentially representing over 90% of the life forms on the planet. Explanation Essay Life of Birds. For some birds, flight is an exhausting process. However many species are take different approaches to flight.Free birds papers.

Life of birds essay - 507glenrock.com

The earliest birds of which we have any record were descended from reptiles and lived about a hundred and thirty million years ago. These first birds had tails like lizards and teeth in their jaws. Over a period of many millions of years, the wings developed at the expense of the tail and the teeth disappeared. Thus birds as we know the today have evolved. They now differ very much from reptiles and it is only because of the research of zoologists one hundred years ago, that they were found to belong to the same class.

There are about eight thousand five hundred different species of birds, and the world can be divided up into areas or regions in which a large proportion of birds in those regions are found there and nowhere else. There are six formal regions. The Northern and Southern Hemisphere are divided into two regions each and the Far East is covered by two : -- the Oriental and the Australian. Such divisions are only very rough ones and are not as definite as the rubber producing areas of the Far East would be on a map. The oyster-catcher for example, with its long red bill and pink legs, does not belong anywhere and is as well known in New Zealand or New Guinea as it is in Britain. The house sparrow or starling, very common birds in most parts of Britain is never seen in Scotland. The line which divides the two Far Eastern 'bird regions' passes through the Indonesian Islands, and it is not by chance that it does. It is called the Wallace Lien after the great explorer and naturalist. On one side of it the birds of Bali are completely different from the birds of Lombok on the other side and only twenty miles away.

Flying birds are all physically built for an active life. Their bodies are very muscular with hollow light bones, a sharp keel and a powerful heart. They are nearly always small to reduce weight and are covered with feathers which are light and not only keep the bird warm, but also assist in flight. Feathers are usually attractive and bright and a bird has many different kinds ranging from the Quill, which is stiff and barbed to the soft down found on the breast. On the whole, it is only the small birds that fly. The ostrich, for example, while possessing all the bird-like characteristics stays firmly on the ground because of its size.

The habits as well as the physical build of birds are similar too. Mating and courtship are purely by instinct and it is not true that the male courts the female with passionate bird-song ! Before mating, the cock-bird will annex his own territory according to his own needs. He then proceeds to 'stake his claim' by singing aggressive songs which keep other would-be tenants away and attracts the female. then comes the important business of building the nest. All birds do this with a few exceptions like the cuckoo, which 'borrows' other nests or the mound-bird family in which Australia, which leaves the eggs ins and or rotting vegetation. The hen bird must then lay the eggs and incubate the young and after they arrive, parent birds feed them and train them to fly and fend for themselves.

Migration is another habit which some, though not all, birds share. The mystery of migration has intrigued men for centuries. It is thought that cold weather and shortage of food cause birds to migrate and this may well be true, but how and why they plot their courses are much harder questions. Some British swallows, for instance, will winter in the South of England, while others have been found in the USA. The Arctic Tern flies half way round the world to migrate from its breeding ground in the Arctic to the fringe of the Antarctic. They gray plover, breed in Siberia journeys to Australia. Much has been discovered about migration through the process of ringing birds and it has been found that for year after year, swallows will fly to the same place in South Africa and then returns to England in February. The young do not always fly with the old. How they find their ways is another mystery. Some ornithologists say that it is purely instinct or an inborn common sense which tells them. Others think that they are guided by the moon and stars or by the lines of coast and rivers. It is suggested now that a bird such as the Arctic Tern has built-in radar equipment since every year it lands on the same solitary Pacific Island to rest. As with so much of nature there is, as yet, no final answer.

Birds play an important part in the life of man. Some of them, like the common sparrow are merely pests, while others help to rid the world of insects on which they live and which otherwise would become a menace. many larger birds like hens and ducks provide food for man in the form of meat and eggs. Wild fowl provide sport as well as game in the catching of it. Feathers are used for different purposes as in hats or for down. Finally there is the beauty of birds -- whether the tuneful song of the nightingale or the magnificent plumage of the peacock. All are there to delight the hearts of men, not only of ornithologists, but of ordinary people who, perhaps, in the middle of a dreary day will be cheered by the clear bell-like song of bird or the sight of a clean, beautiful wing in flight.


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