REFERENCES 117 



a bird's temperament affect its numbers? Give illustrations. When were 

 Bluebirds destroyed by a, blizzard? How long before their numbers reached 

 normal? What is the probable reason of their sudden increase? 



REFERENCES 



1883. MARTIN and MOALE, How to Dissect a Bird (Macmillan). 1884. 

 COUES, E., Key to North American Birds (Dana Estes) rev. ed. 1902, Vol. 

 I, pp. 59-233 (important). 1893-1896. NEWTON, A. and others, A Diction- 

 ary of Birds, 1 vol., 1088 pp. (Macmillan). 1894. MORGAN, C. L., An 

 Introduction to Comparative Psychology, 12mo., 382 pp. (Scribner's). 

 1895. HEADLEY, F. W., The Structure and Life of Birds, 12mo. 412 pp., 

 ills. (Macmillan). 1898. BEDDARD, F. E., Structure and Classification of 

 Birds, 8vo., 548 pp., ills. (Longmans). 1897. BASKET, J. N., The Story 

 of the Birds, 12mo., 263 pp., ills. (Appleton). 1906. BEEBE, C. W., 

 The Bird. Its Form and Function, 8vo., 496 pp., ills. (Holt). 1910. 

 PYCRAFT, W. P., A History of Birds, 8vo., 458 pp., ills. (Methuen, London) 

 1910. HERRICK, F. H., Instinct and Intelligence in Birds, Pop. Sci. 

 Monthly, June, July, and August. 1911. Various Authors, Journ. of 

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