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Bird Migration
Thomas Alerstam
出版Cambridge University Press, 1993-03-25
主題Nature / Birdwatching GuidesScience / Life Sciences / Zoology / GeneralScience / Life Sciences / Zoology / Ornithology
ISBN05214482209780521448222
URLhttp://books.google.com.hk/books?id=_oE29KijRlAC&hl=&source=gbs_api
EBookSAMPLE
註釋Bird migration is one of the most astonishing feats in the natural world. Millions of birds migrate, often over very large distances, to benefit from seasonal resource surpluses and to avoid predators and competitors. The aim of this study is to survey the phenomena.