166 



BRITISH BIRDS. 



another and a more important point — that the unfolding 

 or straightening of the wing takes places, if again there 

 is no extreme haste, subsequent to the raising. This 

 especially refers to the pinion. 



It will be noticed that although the humeri are raised 

 almost to meeting above the back (Figure 2), the ulnae 



FIGURE 3. — GOING. 

 (Photographed by Bentley Beetham.) 



are not fully extended and in line with them, while the 

 pinions are little divergent from the latter, still making 

 an acute angle with them. Casually one might have 

 expected that, had there been any precedence, the pinion 

 being the most important factor, would have been the 

 first to assume the position requisite for flight, but if 

 these two photographs be carefully examined the reverse 

 appears to be the case. In short, it may be said that 



