Fig. 33. Ruffed Grouse brooding. This 



picture admirabl y illustrates a phase of 

 ground-matching by the Ruffed Grouse's 

 most beautiful and elaborate 'obliterative' 

 picture-patterns. 



Photographed from life by George C. Embody. 



Figs 34-35. Dead Ruffed Grouse laid on its side. Fig. a4, breast view; Fig. 35, back view both consnif-nn.i^ 

 because in wrong po.sitions for the normal working of the obliterktive shading. ' conspicuous 



Photographed oxit of doors. 



