它钻进了二楼住户的空调孔,那个没有粗管线伸出,四周布满铁锈和泥渍的圆孔。一截尾巴还露在外面,不伸展开是黑色,伸展,就看到一刹那的白。不知道是什么鸟。某种雀,小小的,比麻雀略大,黑色的头颈,白色的腹部,黑色的羽翼两侧有两条长长的白纹。在冬天,它们像一只只跳跃着、能够发出清脆叫声的饱满羽球。我看着那只黑白相间的球从空调孔钻 It drilled into the air conditioning holes on the second floor of the household, that there is no thick pipe line out, surrounded by rust and mud stains round hole. A tail is also exposed outside, do not stretch open is black, stretch, you see the flash of white. I do not know what kind of bird Some kind of bird, small, slightly larger than the sparrow, black head and neck, white belly, black wings have two long white lines on both sides. In the winter, they are like a jump only, to make a crisp sound full badminton. I looked at the black and white ball from the air conditioning hole drilling