By modern standards, Archaeopteryx could not fly very well. The soft feathers of an owl allow it to fly quietly. All the other birds will join in and sing "Wooooooo!" Some birds can sing, and they are called songbirds. Archaeopteryx, from the Upper Jurassic (some 150–145 million years ago), is the earliest bird which could fly. In the autumn, families get together in large flocks and do a lot of singing. Crows and ravens often perch high on bare trees in the winter, where their black shape against the sky looks like the dark bare branches. Many birds, like this American flamingo, tuck their head into their back when sleeping. Penguins spend a great deal of time at sea, where they are in danger from seals. They are warm-blooded and lay eggs. Examples are robins, larks, canaries, thrushes, nightingales and crows. Birds are the descendants of theropod dinosaurs, and the early birds looked much like small carnivorous dinosaurs. Birds of prey eat mammals and other birds. Other early fossil birds are, for example, Confuciusornis, Anchiornis huxlei, and other Paraves. Swallows like to nest near other swallows. Robins will make a beautiful little round nest of woven grass and carefully line it with feathers, bits of fluff and other soft things. They are warm-blooded and lay eggs. Food!" It is famous, because it was one of the first important fossils found after Charles Darwin published his ideas about evolution in the 19th century. They can sleep while gliding and have wings which, when they are stretched right out, look like the wings of a jet plane. When a flock of birds is feeding it is common for one bird to perch on a high place to keep guard over the flock. Baby cuckoos grow fast and often get bigger than the parents who feed them. Different types of birds eat different foods. Their wings have adapted to life in the sea and have become flippers which help them in swimming very fast. This makes them lighter and makes flight easier. Kiwis are endangered because European settlement to New Zealand brought animals like cats, dogs and rats which kill kiwis and eat their eggs. CTRL + SPACE for auto-complete. A flock of tundra swans fly in V-formation. It is thought that they do this to support the leader and help the young ones. These communication sounds are often short hard sounds like chirps, squeaks, squawks. The nictitating membrane as it covers the eye of a masked lapwing, Restless flycatcher in the downstroke of flapping flight. Birds that fly very quickly, such as swifts and swallows, have long narrow pointed wings. When the breeding season arrives, the birds choose partners. Songbirds are passerines, many of which have beautiful melodic songs. This is heat released by the chemical action of bacterial and fungal respiration. Their eggs are shaped so that they roll around in circles and do not fall off cliffs. In the case of dodos, they were fat and delicious. When it comes to different bird species, you’ll find out just about 10,000 different types of birds across the globe. Birds that are awake at night are called nocturnal birds. Some birds are mated for life, like married couples. The world's largest eagle, the Philippine eagle has a wingspan of about 2 metres (6.7 ft) wide. Many birds are brown, green or grey. Many birds from hot countries are green or have some green feathers, particularly parrots. This explains why one might say birds are living dinosaurs. In 2005, there was an epidemic of bird influenza spreading through some parts of the world, often called avian flu. However, grackle is also good in doing so. Birds of different types can live in freezing cold environments, and others can live in hot deserts. Birds are the magnificent creation of nature and it has bestowed upon them some significant and eye catching abilities and features. Their beaks are often flat for scooping up water weeds. Albatrosses take 80 days. Many birds live on insects or on fish. There are over 9,500 species of birds in the world. Water birds, no matter what colour they are on top, are often white underneath, so that when a fish looks up, the bird looks like part of the sky. and twitters. The parents leave the mound. The biggest birds are flightless birds with long legs – ostriches, emus and cassowaries.
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