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_____________________________________ОТРЯД ПТИЦЫ
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BIRDS
Birds are one of the six basic groups of animals. There are some 9,700 species of birds alive today that inhabit a wide range of habitats including wetlands, woodlands, mountains, deserts, tundra, coasts and the open ocean. To better understand the immense diversity of birds, it is useful to examine the main groups of birds. Although there are several different ways experts classify birds into subgroups, on this website we recognize that there are 30 groups of birds:
1. Albatrosses and Petrels - Procellariiformes
Albatrosses and petrels, also known as tubenoses, are a group of seabirds that includes albatrosses, fulmars, prions, shearwaters, storm-petrels and diving petrels. Tubenoses are pelagic birds that spend long periods of time foraging over the open ocean. They have a widespread distribution and occur throughout most oceanic regions of the world. Tubenoses return to land only to breed. They select nesting sites on remote islands and on rugged coastal cliffs. There are 107 species of tubenoses.
2. Birds of Prey - Falconiformes
Birds of prey, also known as raptors, are formidable avian predators, armed with powerful talons, hooked beaks and acute eyesight. Raptors generally have broad wings well-suited for soaring. Raptors hunt by day and feed on a variety of prey including fish, small mammals, reptiles and carrion. Raptors first appeared during the Middle Eocene. The group includes eagles, hawks, kites, falcons
and old world vultures and comprises a total of 304 species.
3. Buttonquail - Turniciformes
Buttonquails are a small group of birds consisting of 15 species. They have 3 toes on each foot and lack a hindtoe. Although buttonquails resemble quails, they are not closely related to them. Buttonquails inhabit grasslands, scrublands and croplands. They are drab-colored birds and prefer running to flying. Their distribution includes Asia, Africa, Madagascar, Morocco, Algeria, Spain,
Portugal, Australia, Malasyia, the Philippines and Papua New Guinea.
4. Cassowaries and Emus - Casuariiformes
Cassowaries and emus together form a group of large flightless birds comprised of just four species—three cassowaries and one emu. Cassowaries inhabit New Guinea and Australia, emus are restricted to New Guinea. Although their ancestors could fly, present-day cassowaries and emus have only tiny vestigial wings that are far too weak to lift their bulky bodies into the air. Their feathers have become limp and shaggy and resemble coarse fur. The two groups occupy different habitats—cassowaries prefer forests while emus opt for scrublands and grasslands.
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