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Birds are social having feathers with two strong wings and two legs. Birds are special kind of animal species which can fly in the sky and travel long distances in the air. It builds nest on the trees, and eats insects, fish, grains, etc. Its tail helps it to keep balance in the air, and the two legs for hopping. It lays eggs, and hatches the young ones. Birds have certain specific characteristics that are common to all of them. They are an important part of the ecosystem.
Some characteristics of modern birds are feathers, beak, egg-laying, high metabolic rate, four-chambered heart, light weight but strong skeleton. Wings which are actually evolved forelimbs help the birds in their flight. Birds may be of different sizes. They could be small as much as 2 inches to as big as 2.75 meters (like an Ostrich). Fossil records indicate the emergence of birds to as old as 160 million years ago.
The bigger size birds like eagle or the long necked cranes are fond of fish. The vultures are fond of flesh of dead animals. The owls can see even in darkness. The bats hang from the branches of trees upside down. The bats are actually mammals and not birds, although they resemble birds. Some of the beautiful birds are trained in cages by men.
Birds are social having feathers with two strong wings and two legs. Birds are special kind of animal species which can fly in the sky and travel long distances in the air. It builds nest on the trees, and eats insects, fish, grains, etc. Its tail helps it to keep balance in the air, and the two legs for hopping. It lays eggs, and hatches the young ones. Birds have certain specific characteristics that are common to all of them. They are an important part of the ecosystem.
Some characteristics of modern birds are feathers, beak, egg-laying, high metabolic rate, four-chambered heart, light weight but strong skeleton. Wings which are actually evolved forelimbs help the birds in their flight. Birds may be of different sizes. They could be small as much as 2 inches to as big as 2.75 meters (like an Ostrich). Fossil records indicate the emergence of birds to as old as 160 million years ago.
The bigger size birds like eagle or the long necked cranes are fond of fish. The vultures are fond of flesh of dead animals. The owls can see even in darkness. The bats hang from the branches of trees upside down. The bats are actually mammals and not birds, although they resemble birds. Some of the beautiful birds are trained in cages by men.
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