Birds Birds | Awesome Wallpapers

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Thursday, November 29, 2012


                 Birds (class Aves) are feathered, winged, bipedal, endothermic (warm-blooded), egg-laying, vertebrate animals. With around 10,000 living species, they are the most speciose class of tetrapod vertebrates. All present species belong to the subclass Neornithes, and inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from the 5 cm (2 in) Bee Hummingbird to the 2.75 m (9 ft) Ostrich. The fossil record indicates that birds emerged within theropod dinosaurs during the Jurassic period, around 160 million years (Ma) ago.
                The subclass Neornithes has two extant superordersPalaeognathae. and  Neognathae. The Palaeognathae consists of two orders which comprise 49 existing species: Struthioniformes (ostriches, emus, kiwis, and allies) and Tinamiformes (tinamous). Neognathae comprises 27 orders which have a total of nearly ten thousand species. The orders comprising the Neognathae are: Anseriformes (waterfowl), Galliformes (fowl), Charadriiformes (gulls, button-quails, plovers and allies), Gaviiformes (loons), Podicipediformes (grebes), Procellariiformes (albatrosses, petrels, and allies), Sphenisciformes (penguins),Pelecaniformes (pelicans and allies), Phaethontiformes (tropicbirds), Ciconiiformes (storks and allies), Cathartiformes (New World vultures), Phoenicopteriformes (flamingos), Falconiformes (falcons, eagles, hawks and allies), Gruiformes (cranes and allies), Pteroclidiformes (sandgrouse), Columbiformes (doves and pigeons), Psittaciformes (parrots and allies), Cuculiformes (cuckoos and turacos), Opisthocomiformes (hoatzin), Strigiformes (owls), Caprimulgiformes (nightjars and allies), Apodiformes (swifts and hummingbirds), Coraciiformes (kingfishers and allies), Piciformes (woodpeckers and allies), Trogoniformes (trogons), Coliiformes (mousebirds), Passeriformes (passerines).

                      Swans wallpapers                                   Mycteria Storks wallpapers 
swans wallpapers mycteria storks wallpapers
        Scarlet macaw wallpapers                      Black crowned crane wallpapers
scarlet macaw wallpapers black crowned wallpapers
                Ostrich wallpapers                                  Hummingbird wallpapers
 Ostrich wallpapers  Hummingbird wallpapers
                         Kiwi wallpapers                                                               Chicken wallpapers
 Kiwi wallpapers Chicken wallpapers
                         Hoopoe wallpapers                                                          Toucan wallpapers
  Hoopoe wallpapers  Toucan wallpapers
                     Wild duck wallpapers                                                     Swallow wallpapers
Wild duck wallpapers Swallow wallpapers

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