The Senses 



221 



and seize the earthworm for which it is seeking. The 

 eyes have become unusually large in consequence of its 

 nocturnal habits and in addition are placed far back 

 upon its head, permitting a clear lookout for danger, 

 above and even behind, while probing with its head held 

 close to the ground. 



Fig. 159 



Fig. 160. 



Fig. 159.— Photograph of living Woodcock with bill closed. 



Fig. 160 —Same with bill open, showing mobility of upper mandible. The bird 

 is thus enabled to feel about and seize the earthworms deep down in the mud. 



Thus ends our brief survey of the five senses ; that of 

 smell taking note of minute particles of matter diffused 

 in the air; sight and hearing depending on vibrations of 

 the atmosphere; the sense of taste detecting matter which 

 is dissolved in water, and that of feeling making the bird 

 cognizant of the qualities of bodies by actual contact. 



