MOUNTING BIRDS. 
73 
wish it to be placed. As a rule, a perpendicular 
line drawn through the back of the head of a 
perching bird will fall through its feet (see Fig. 
1 6 , a a). Now bring the bird into position, and 
fold the wings just as the bird does it. Note if the 
scapularies, tertiaries, and secondaries lie in their 
