Bird migration is a most fascinating subject. Every year, millions of birds travel, sometimes thousands of kilometres, from summer to winter quarters and back again. Those birds who survive the journey know exactly where they are going. This book,which includes many outstanding photographs, tells you how the birds manage this. It also explains why birds migrate, and describes their migratory routes and destinations. The book also tells you when birds migrate, how they find their way, and how high and at what speed they fly. It includes an examination of the relationship between migratory birds and people.
|Раздел:||Енциклопедии. Каталози. Справочници, Енциклопедии и справочници, Книги|