Courtship and Display among Birds. By C, R. Stonor. (Country Life, Ltd.) With 57 plates from photographs, 8s. 6d. net. No aspect of bird behaviour is more fascinating, more biologically important or offers a more promising field for study than that of display and courtship. Moreover the field is one which notwithstanding the patient and critical work of a limited number of first-rate observers and an increasing interest amongst field ornithologists in general has been by no means as fully exploited as it might have been. Mr. Stonor's book should help to diffuse interest in the subject more widely, and this, we take it, is one of its objects, for the author expressly states that it is intended " for the non-specialist, interested in natural history, and for ornithologists who have not had time to go deeply into this branch of their subject." Some may feel a certain regret that the author has not--while adhering to his plan of writing an elementary account--made it a little more comprehensive or perhaps we should rather say a little more balanced. Selection of examples cannot have been altogether easy, but it seems a pity when nearly twenty pages are devoted to the displays of the birds-of-paradise (admittedly very remarkable), that next to nothing should be said about the far less highly evolved but often interesting displays of any of our native passerines, nothing about the remarkable flight displays of the birdsof-prey and so little about the notable performances of the ducks and waders
Issue 9

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