24 



FORM AXD HABIT: THE WING. 



hicli, whistling sound. In other cases the shafts of the 

 wing-feathers may be much enlarged and horny, when 



the bird makes a sin- 

 gular snapping sound 

 in flight. 



If you recall the 

 supplicating manner of 

 a young bird as with 

 nut'urai gently fluttering wings 

 it begs for food, you 

 ■sWll recognize one of several ways in which the wings 

 may express emotion. Birds also threaten with their 

 wings, as any hen with chicks will testify, and from this 



Fig. Q. — Wing of Woodcock, showing three 

 outer attenuate feathers. (V. 

 size.) 



Fici. 10.— Jacana, showing spur on wintr (natural size) and elongated toes ('/a 

 natural size). 



gesture to the actual delivery of a blow is but a step. 

 Swans, Pigeons, and Chickens can deal forcible blows 

 with their wings. Screamers, Lapwings, and Jacanas 



