Evolution Of Birds
Evolution of Birds
It has become widely accepted that birds have evolved from reptiles in the Jurassic period and are the living descendants of a group of dinosaurs called theropods. Birds share hundreds of unique skeletal features with dinosaurs. Over the years, birds have evolved in a wide variety of forms, from flightless and aquatic to flying animals. Due to poor fossil records, some information regarding the evolution of birds are based on theories but during the last 30 years, the evolutionary relationship between birds and dinosaurs have become more firmly established. Some important evolutions of birds were the evolution of feathers, and avian locomotion (Bird evolution, 1996).
The modern bird has been modified significantly. The body evolved in such a way for it to be fit to fly. For example, the front limbs became wings, and their breastbone was enlarged in order to support flight muscles. They also now have light, hollow bones. A significant modification was the......
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