Aesthetic birds f

They are vertebrate animals, which belong to the cold-blooded. There are tens of thousands of bird species, which live in different habitats of the world, from the Arctic to the South. Birds are distinguished by their bilateral movement, their wings and colorful feathers, and they lay hard-shell eggs, and their beaks without teeth, and have a high metabolism rate, and four heart chambers, and a lightweight and strong skeleton, and most birds have the ability to fly except for some species such as ostriches, penguins, and some The species that inhabit the islands, have digestive and competitive organs suitable for flight, and some birds, such as parrot, are distinguished by their high intelligence