ISBN:9780064451505
作者:Roma Gans
适合年龄:9-12岁
主题:科普
系列:Let‘s read and find out science
分类:初级绘本
页码:32
定价:$5.99
分馆:昆明馆 是否在馆:在馆
Many birds travel thousands of miles each year, migrating between summer and winter homes. Just how they find their way back and forth, sometimes returning to the exact same nesting grounds each year, has puzzled ornithologists for years. Roma Gans details the many theories scientists have proposed to explain the mysteries of migration.