EXPERIMENTS ON PROTECTIVE COLORATION 499 



Many other lines of experiment in the great field of animal 

 color will suggest themselves to every naturalist, but the ones 

 just specified are those which suggest themselves as a logical 

 sequence to those herein described, 



SUMMARY 



1. Protective resemblance is effective in protecting motionless 

 animals from attacks by caged birds. 



2. Stillness is probably a more important factor than color 

 in protecting animals from their foes. 



In concluding this paper, it is my pleasure to thank the United 

 States Biological Survey through Mr. Vernon Bailey, and the 

 United States National Museum, through Mr. Richard Rath- 

 bun, for the loan of material; and Messrs. Alf. Eastgate, Clark 

 Kelly and Robt. Gray, of Devils Lake, North Dakota, for 

 various courtesies, in connection with my work. 



