Public domain. Cover image from Project Gutenberg ebook #65222.
Migration of Birds (1979)
章节(22)
- Migration of Birds (1979) 0:00
- MIGRATION OF BIRDS: PREFACE 0:18
- INTRODUCTION 2:58
- THE HISTORY AND SCOPE OF MIGRATION 7:03
- TECHNIQUES FOR STUDYING MIGRATION 13:05
- ADVANTAGES OF MIGRATION 27:31
- STIMULUS FOR MIGRATION 31:01
- WHEN BIRDS MIGRATE 35:16
- SPEED OF FLIGHT AND MIGRATION 47:55
- ALTITUDE OF FLIGHT AND MIGRATION 1:03:17
- SEGREGATION DURING MIGRATION 1:12:30
- WHERE BIRDS MIGRATE 1:22:47
- ORIENTATION AND NAVIGATION 1:32:33
- INFLUENCE OF WEATHER 1:43:23
- INFLUENCE OF TOPOGRAPHY 1:54:53
- PERILS OF MIGRATION 1:58:52
- ROUTES OF MIGRATION 2:05:18
- PATTERNS OF MIGRATION 2:40:23
- ORIGIN AND EVOLUTION OF MIGRATION 3:02:14
- WHERE WE STAND 3:13:36
- BIBLIOGRAPHY 3:17:05
- LIST OF BIRD SPECIES MENTIONED IN TEXT 4:14:55