Birds Animals

BIRDS

                                    

Birds are warm blooded vertebrates that nest to lay their eggs, from which the bird offspring hatch. The birds skin is also covered in layers of feathers, to keep them warm but the feather also make the bird extremely light so it can fly without trouble. All birds have wings and most can fly over very long distance, some species of bird migrates thousands of mile every year, while others can only fly a few feet. The penguin is one of the only birds in the world that cannot fly as their wings are too small to lift their body. There are around 10,000 species of bird found worldwide, although studies suggest that many more species have become extinct. The bee hummingbird is the smallest species of bird in the world growing to around 5cm, with the ostrich being the largest species of bird and growing to nearly 3m tall.