AVES 



307 



FIG. 158. Types of Coraciiformes, showing generalized and specialized species. 

 A, Trogon or Quezal, Pharomacrus modnno; B, Toucan, Rhamphastus arid; 

 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.) 



