燕子是雀形目燕科的小型鸟儿,古时把它叫做玄鸟。燕子翅尖长善飞,嘴短弱,嘴裂宽,为典型食虫鸟类。它上体发蓝黑色,还闪着金属光泽,腹面白色。体态轻捷伶俐,两翅狭长,飞行时好象镰刀,尾分叉象剪子。不论飞行还是站立,燕子娇小玲珑的体态都非常富有美感令人悦目。 Swallows are small birds of the genus Swallow, ancient call it Xuanniao. Swallows fin sharp long good fly, short mouth, mouth wide mouth, as a typical insectivorous birds. It is blue-black body, but also shiny metallic luster, ventral white. Light body clever posture, his wings narrow and long, flying like a sickle, the end of the fork like a scissors. Whether flying or standing, swallow petite exquisite body is very rich and beautiful pleasing to the eye.