蛇鹫不是威胁，但奇怪又有趣的是，蛇鹫又叫文书鸟。
A secretary bird is not a threat , but bizarre enough to be interesting , secretary birds are so called .
蛇鹫又叫文书鸟，是因为耳朵后面很像插着一排羽毛笔。
Secretary birds are so called because they look as if they are keeping a bunch of quilled pens behind their ears .
蛇鹫