TABLE OF CONTENTS 



PACE 



Introduction: by Abbott H. Thayer. An Essay on the Psychological and other basic 



Principles of the Subject 3 



CHAPTER I 



Outline of the book's scope. "The Law which underlies Protective Coloration" introduced 



and analyzed. Poulton cited 13 



CHAPTER n 

 Definition of terms. Obliterative Shading, pure and simple 24 



CHAPTER III 

 First principles of the use of markings with obliterative shading. 'Picture-patterns' ... 30 



CHAPTER IV 

 Picture-patterns, with obliterative shading, on birds. American Woodcock, and Snipe . . 33 



CHAPTER V 



Picture-patterns on obliteratively-shaded birds, continued. Terrestrial Goatsuckers (Whip-poor- 

 wills, etc.) 35 



CHAPTER VI 



Picture-patterns on counter-shaded birds, continued. Forest Grouse, Owls, European Wood- 

 cock 38 



CHAPTER VII 



Picture-patterns on counter-shaded birds, continued. Grass-patterns, heather-patterns. Spar- 

 rows, Waders, Ptarmigan, etc 44 



CHAPTER VIII 



Picture-patterns on counter-shaded birds, continued. Scansorial (Climbing) birds. Creepers, 



Wrynecks, Woodpeckers, etc 40 



xi 



