386 OBSERVATION OUTLINE 



4. Cared for by Parents. 

 Fed in nest. 



Food brought in bill (ex. Sparrows). 



Food regurgitated (ex. Hummingbird). 



Rapidity in feeding, and interval between meals. 

 Care of young shared by male and female. 

 All the young kept together on leaving nest, or family 



separated, each parent feeding its squad. 

 Young taught to sing. 

 Notes and actions of young. 

 Nestling plumage. 

 X. Problems. 



1. Color and Markings. 



Protective coloration (exs. Sparrows and Vireos). 



Gradation of tints to comiteract light and shade 

 (ex. Grouse). 



Markings to disguise form (exs. "Whip-poor-will and 

 Junco). 

 Sexual coloration (exs. Oriole and Scarlet Tanager). 

 Relation of color to food. 

 Manner of seasonal change in plumage. 



Moulting. 



Wearing off of edge of feathers. 



Change in color of feather. 

 Recognition marks (exs. Junco and Chewink). 

 Color of eggs. 



2. Individual Variation. 

 In song. 



In habits. 



3. Intelligence, as sho\\t^ by 

 Caution. 



Curiosity. 



Action towards enemies. 



Change of habits as result of danger. 



Building. 



Choice of sites. 



