14 EXTERNAL PARTS 



CHAPTER II 

 HEAD AND BODY 



Certain regions of the head and body have received special 

 names, which are much used in descriptions. A few diagrams 

 and definitions of these parts will be necessary. 



The top of the head (see cut) is the crown; in front of this 

 next the bill is the forehead ; back of the crown is the nape. 

 Above the eye there is a region often marked by a peculiar 

 color; this is the superciliary line, in this book usually called 

 the line over eye. A line around the eye has been called orbital 



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ring. A straight band extending from the eye to the bill is 

 called the lore; this strip is bare of feathers on many swim- 

 ming birds. Below and back of the eye, in the region of the 

 ear, are the auriculars. This region, including a little below it, 

 forms the cheek. The back corner of the mouth forms the 

 rictus. This section is often bristly with hairs which are called 

 rictal bristles. 



