Fid, IS. Diagram showing tlxe picturing of perspective Iry animals' 

 patterns. The bird is supposed to lie vertically placed, and looked some- 

 what ,/oini upon against a uniformly patterned horizontal ground-plane-. 



IP 



FIG-. 19. Diagram supplementing Fig. 18, showing I he 

 coarser ^(/r/i'-pattern, required to" match the ground- 

 pattern un-foreshortened and almost undiminished, as 

 when seen from directly above. 



Fi&. 21. Shows particularly well the head-markings' 

 picturing of a shadowed cavity crossed by lighted twigs 

 or grasses. 



shading 0 '"' 2 °" 21 ' AmeriCan Woodcock 0U " S Uest; lowing the «''" , l<i»g of the wonderful obliterative picture-patterns, founded on counter- 



