Birds (along with fish, reptiles, amphibians and mammals) are vertebrate animals. This means they have a skeleton (made of bone or cartilage) and a backbone which is also called a vertebral column.
Birds are unique from other vertebrate animals in that they possess feathers. Feathers have enabled birds to become the most accomplished aeronaughts the world has ever seen. Birds can fly high and low, at great speed or very slowly and always with extra-ordinary precision. Birds are warm-blooded creatures because they are able to generate their own heat. They have beaks with no teeth and they also have a lightweight skeleton. Birds lay hard-shelled eggs.
We have a great variety of resident birds in England. Resident birds are those who nest in this country and can be seen all year round. Our 94 resident birds include beautiful song birds in looks and sounds, powerful birds of prey, birds of coasts, lakes, river and streams. We also have birds of woods and open countryside and we also find birds in gardens which not only provide food but a good habitat too. We are a nation of bird lovers and bird watchers and the study of birds is called ‘ornithology’.