Birds or poultry are members of vertebrates (vertebrates) that have feathers and wings. The oldest fossil bird found in Germany and known as Archeopteryx.
The bird species are so varied, ranging from tiny tiny hummingbirds to ostriches, which are taller than people. It is estimated that there are about 8,800 - 10,200 bird species worldwide; about 1,500 species of which are found in Indonesia. These bird species are scientifically classified into the Aves class.
Most birds should eat food at least half of their body weight each day. [Need a reference]
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