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Birds useful and birds harmful
Capítulos (13)
- BIRDS USEFUL and BIRDS HARMFUL 0:00
- BIRDS USEFUL and BIRDS HARMFUL: Preface. 0:18
- CHAPTER I. Useful or Harmful? 9:06
- CHAPTER II. The Structure of the Bird. 21:24
- CHAPTER III. WORKERS ON THE GROUND. 29:25
- CHAPTER IV. IN THE AIR AND ON THE TREES. 1:59:59
- CHAPTER V. SUMMER WORKERS. 2:36:05
- CHAPTER VI. WORKERS ALL THE YEAR ROUND. 3:55:01
- CHAPTER VII. SOME WILDFOWL. 4:52:58
- CHAPTER VIII. SOME OF THE FALCONIDÆ. 5:41:33
- CHAPTER IX. Rational Bird Protection. 6:21:12
- IN CONCLUSION. 6:33:27
- Index. 6:36:51