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鸟类是动物界中的一个类群,是大自然的组成部分。尽管大家对麻雀、鸽子、燕子十分熟悉,但常常会忽视身边的鸡、鸭、鹅这些也是鸟类的家禽。一般来说,鸟类可以在空中自由飞翔,这是它们的身体结构、生理机能适应飞翔生活的结果。鸟类区别于其他脊椎动物的主要特征是:鸟类是一种体表覆盖羽毛、有翼(翅膀)、恒温、卵生的高等脊椎动物。鸟类羽毛色彩多样,大小各异。收集各种羽毛能增长不少鸟类的知识。若把羽毛做成标本,还别有一番风味。
Birds are a group of animals and are part of nature. Although you are familiar with sparrows, pigeons and swallows, you often overlook the chickens, ducks, and geese that are also birds. In general, birds can fly freely in the sky as a result of their physical structure and physiological functions adapted to fly life. The main characteristics of birds from other vertebrates are: Birds are a group of higher vertebrates covered with feathers, winged (wings), warm, oviparous. Bird feathers vary in color and size. Collect a variety of feathers can increase the knowledge of many birds. If the feathers made into specimens, but also do not have some flavor.