70 WINGS STRUCTURALLY ALIKE 

 golden-crested regulus weighs 80 grains, with 

 a wing extension of 6 in. The wings of both 

 species are structurally alike, and so are the 

 wings of all birds. The feathering system, 

 subject to modifications, is also the same 

 throughout. This clearly shows that the wing 

 of a bird is the best possible design for the 

 purpose. It has been naturally evolved and 

 apparently reached finality, for it is incon- 

 ceivable that flight could be more perfect 

 than manifested by some birds. For instance, 

 the majestic flight of an eagle, the marvel- 

 lous aerial evolutions performed by the swift, 

 or the lightning rapidity of the humming- 

 bird's flight, only to mention three. In truth, 

 these aviators, each in its own realm, holds 

 complete mastery of the air. 



