bird Definition

The bird (kind of Aves) is two full animals, endothermic (warm-blooded), gets down the egg vertebrate.

Some about 10,000 survival types, make they most different quadruped the vertebrate. they live stretch across Earth’s ecosystem, from the North Pole to the South Pole state. Bird from 5 cm (2) bee hummingbird in size scope to 2.7 m (9 ft) ostrich. The fossil record indicated in the Jurassic Period period, the bird evolved from the theropoda dinosaur, about 150-200 Ma (1,000,000 years ago), and early time’s known bird is the late Jurassic Period archacopteryx, c 155-150 Ma. The most paleontologists thought that the bird survives the Cretaceous Period tertiary becoming extinct event about 65.5 Ma dinosaur’s only clade. What modern bird description is the feather, the beak does not have the tooth, the laying aside to have the hard shell egg, the high metabolism rate, four have the room heart and the lightweight, but strong skeleton. All birds have the achievement wing the foreleg which revises and can most fly, have some exceptions including the ratite, the penguin and the certain amount different local island type. The bird also has the unique digestion which and the respiratory system adapts for the flight altitude. Some birds, specially corvids and the parrot, are in the most intelligent animal type; Certain amount’s bird type is the manufacturing industry which and the use tool observes, and many social type exhibition knowledge culture transmission spread-eagle generation. Many types undertake long-distance every year to migrate, and many carry on a shorter anomalous movement. The bird is the society; They communicate the use visual signal and through the telephone and the song, and participates in the social behaviour to raise including the cooperation and to hunt, gathers and besieges the predator. The overwhelming majority bird type is in the society Shan Pei, usually a reproduction season each time, sometimes for many years, but very little lives.

other types have are the plural marriage reproduction system (“many females”) or, are very few, polygamy (” many males “). Egg in nest usual, and hatches by the parents. The most birds have parents’ care extension deadline after the hatching. Many types are the economy are important, the main achievement or farms the gain food origin through the hunting.

some types, the special singer and the parrot, are the universal achievement pets. Other uses (excrement) are the use take the fertilizer including the harvest guano. The bird calculates prominently in human culture’s all aspects from the religion to the poetry to the pop music. About 120-130 types at that time before became becomes extinct as a result of the human activity from the 17th century and over a hundred. At present probably bird’s 1,200 type threat with becomes extinct by the human activity, although the endeavor is carries on protects them.
for:http://www.birds-house.com