CROP 

 ESOPHAGUS 



PROVENTRICULUS 



Crop Worm 

 (Capillaria annulata) 



Plate 35. A (Upper). Diagram of alimentary canal of the ruffed grouse 

 showing location of some parasite infestations. B (Lower left). Grouse stomachs: 

 a. normal; b. lightly parasitized with Disphanjnx spiralis; c. heavily parasitized with 

 D. spiralis. C (Lower right). Stomach worms (Displuirynx spiralis) (small) and 

 intestinal worm (Ascaridia lineata) (large worm), showing comparative size. 

 Photos ]nj A. A. Allen. 



