The illustrations for this book have been made from photographs 
taken by Mr. Howard T. Middleton, Mr. J. Fletcher Street, Mr. 
William L. Baily, and Mr. A. D. McGrew. The author wishes to 
express his appreciation here of the skill, knowledge, and patience 
which have made such photographs possible. In some of those taken 
by Mr. Middleton, tamed, caged, or mounted specimens have been 
used as models. In others he has persuaded wild animals to photo- 
graph themselves by various ingenious devices. 
