AVES 



307 



Fig. 158. — ^Types of Coraciiformes, showing generalized and specialized species. 

 A, Trogon or Quezal, Pharomacrus mocinno; B, Toucan, Rhamphastus ariel; 

 C, Hummingbird, Eulampis jugularis; D, Common Roller, Caracias garrulus; 

 E, Great Horned Owl, Bubo virginianus, (All redrawn; A, B, C, after Evans; 

 D and E, after Knowlton.) 



