Birds

List of birds with names and descriptions.
The pinnacle of evolution of all vertebrates is considered to be the bird class. Today, warm-blooded creatures inhabit almost the entire planet. Birds are highly adaptable to harsh conditions and survive both on land and in the water and air. They are thought to have evolved from reptiles in the Triassic and therefore have a number of similarities, such as the absence of skin glands, a similar set of bones and ribs with hook-like processes, almost the same circulatory system and the presence of horny scales in the beak cover and on the toes of the hind limbs.

Specific features of bird structure are feather cover allowing body heat insulation, strong and powerful bones, unique beak, heterocellular type of vertebrae, due to which neck and head are very mobile. The birds have excellent hearing and eyesight, excellent spatial orientation and co-ordination of movements.

The bird class is a highly developed animal that walks on two legs, has an intensive metabolism, wings and beak, a highly developed brain, and complex behavioral traits. It is the habitat that has a key influence on the formation of individuals. For example, the territory that the birds inhabit depends on the structure of their body, limbs and wings, the way they feed, breeding features and other distinctive features. The eggs of feathered birds can produce brood (developed and independent) and chicks (underdeveloped, weak, blind, naked).

Of the 8600 species of birds inhabiting our planet, there are 2 groups of animals: the swimming and the typical (newly-fledged). The role of birds cannot be overestimated, as with their help seeds and fruits spread, insects-pests and rodents are exterminated, and weed plants are destroyed. In other words, birds are the biological defence of fields and gardens.