24 



FORM AND HABIT: THE WINa. 



higli, 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 



Fig. 9. — Wing of Woodcock, showing three xi ^ xx • 



outer attenuate feathers. (Vj natural gently lluttermg wmgS 



"'^^-^ it begs for food, you 



will 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. 10. — Jacana, showing spur on wing (natural size) and elongated toes ('/s 

 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 



