Birds useful and birds harmful

This exciting work on birds and plant culture gives a well-structured study of the economic importance of birds in their relation to agriculture. In addition, this book is enriched with illustrations that will help the readers retain information quickly. Contents include: Useful or Harmful The Structure of the Bird Workers on the Ground In the Air and on the Trees The Farmer's Summer Friends Workers all the year round Some Wildfowl Some of the Falconidæ The Rational Protection of Birds