Bss Stars
My name is mubashar mushtaq. I study in beaconhouse school system. I am a boy and I am 15 years old. I have an gmail account. I have also created my account on facebook.com. My father is an business man and his website name is wwwcapasee.com
Thursday 13 November 2014
Birds
Birds (class Aves or clade Avialae) are feathered, winged, two-legged, warm-blooded, egg-laying vertebrates. Modern birdsare characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chamberedheart, and a lightweight but strong skeleton. Extant birds have more or less developed wings; the most recent species without wings was the moa, which is generally considered to have become extinct in the 16th century. Wings are evolved forelimbs, and most bird species can fly. Flightless birds include ratites, penguins, and diverse endemic island species. Some species of birds, particularly penguins and members of the Anatidae family, are adapted to swim. Birds also have digestive andrespiratory systems that are uniquely adapted for flight. Some birds, especially corvids and parrots, are among the mostintelligent animal species; several bird species make and use tools, and many social species culturally transmit knowledge across generations.
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