Fig. 53. American Bittern on its nest, 'obliterated' by picture- Fig. 54 Nesting Virginia Kail, 'obliterated' by connter-shadii 



pattern based on eonnter-sbading. (The 'reed-stripes' mentioned in and background-picturing pattern, 



tbe text are bere not in full operation^ HWted from fife by E. G. Tabor, 



Photographed from life by E. G. Tabor. 



Fig. 55. Wilson's Tern on its nest. (Counter-shading and) 'ruptive' pattern. 



Photographed from life by Francis H. Herrick. Courtes3' also of G. P. Putnam's Sons. 



