Birds (class Aves) are winged, bipedal, endothermic (warm-blooded), egg-laying, vertebrate animals. There are around 10,000 living species, making them the most varied of tetrapod vertebrates. They 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 evolved from theropod dinosaurs during the Jurassic period, around 150–200 Ma (million years ago), and the earliest known bird is the Late Jurassic Archaeopteryx, c 150–145 Ma. Most paleontologists regard birds as the only clade of dinosaurs to have survived the Cretaceous–Tertiary extinction event approximately 65.5 Ma.Birds are also color of nature and birds make beautiful our world. Birds have a lot of different spices and every spices have own color and these colors is too beautiful. Birds food is insects and some other things,They fly everywhere on sky and when they fly togather a different type of shape create and these create very beautiful Lets take a look beautiful and awesome birds more then 45 photos collection hope you enjoy your stay here.