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>^v 



Plate 19. A (Upper). A single grouse meal. Crop contents of a female grouse 

 from Sullivan County, Pennsylvania, December 13, 1940. Top: left, leaves of 

 mountain laurel; right, cherry buds. Below: left, birch buds; right, fruit of moun- 

 tain holly {Ilex monticola), the first record of this species being eaten by grouse. 

 B (Lower). A grouse with a full crop, skinned out to show the immense capacity 

 of this organ when fully distended. The food thus stored passes to the gizzard only 

 as fast as it can be ground and digested. PJioto by A. A. Allen. 



