By LEONARD W . W I N G . (Ronald Press Company, New York, 1956). 539 pages, 222 textfigures and numerous tables. Price $6.75. THERE is g r e a t need at the present time for a general biology of birds covering the whole field, and the present book fills much of this need. In its 539 pages it discusses all the problems which the learner in ornithology should know something about, including Classification, morphology, physiology, evolution, zoogeography, ecology, behaviour, numbers, flight, migration, song, disease, protection, economic aspects, and equipment for field studies. Because its field is so wide, the treatment of each aspect is necessarily brief, but the. aim (and value) of the book is its comprehensiveness ; the field observer will perhaps read it chiefly for those points on which he is not so well-informed. The book is definitely a text-book, and written primarily for the classroom rather than the amateur's library, but within this limitation, it is clear, readable, balanced and careful. Most of the examples, though not all, are drawn from American birds, but this may prove refreshing rather than the reverse for the English reader. The references selected as leading are not always well chosen. Because it is a text-book, the reader cannot expect the presentation of new ideas in an exciting manner, but he is given a wide and accurate survey of existing knowledge, and after reading it, he might well be able to " m a j o r " in
Issue 4

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