è¿??¥ï?ç¦?建ç??ä¸???å¸?æ³°å??¿æ??ä¸?å·¥ä????¨è??¿å¤§??æ¹?ä¸?空å???°ä?60ä½?????群å?ºç?°ç????é»??²å¤§é¸???ï¼?ç»??´å?ç³»å?½å?äº?级ä??¤å?¨ç?©â????é»?é¸ ¬??é»?鸢æ??¹°ç§???鸢å???ä¸?ç§?ä¸?????禽ï?常以??????2~3???群å?ºç?°ï?60ä½?????大å????群å?¨ç?建ç????å®?å±?ç½?è§???

?¾ä¸ºé»?鸢å?¨å¤§??æ¹?ä¸?空é?ç¿????°å??社è??? å§???çº ??