鸟类的迁徙 LE PEUPLE MIGRATEUR FLY AWAY HOMD ZhijunMa/SchoolofLifeSciences,FudanUniversity/No.2005SonghuRoad,Shanghai,200438,PRChina/E-mail:zhijun@fudan.edu.cnZhijun Ma / School of Life Sciences, Fudan University / No. 2005 Songhu Road, Shanghai, 200438, PR China / E-mail: zhijunm@fudan.edu.cn 5 鸟类的迁徙