A C K N O W L EDGMENTS 
Many of the finest wild life photographs ever made are included in 
this book, and where source is known grateful acknowledgment for 
them is hereby given: 
To E. D. Newcomer of Phoenix, Arizona, for the Gila monster and 
cactus on page 86; to W. M. Tillery of Phoenix and Denver for the 
grizzly bear on page 121, also for many personal helps to the author 
in making the general selection; to Jack Tooker of Grand Canyon, 
Arizona, for the bison on page 113 and the twin fawns on page 13; 
to Lewis W. Walker of San Diego, Calif., for the jackrabbit on page 
57, also for the bobkitten on page 149 and the bobcat on page 153; to 
Charles J. Belden of Pitchfork, Wyoming, for the coyote on the half- 
title page and the coyote on page 70; to Natt N. Dodge of Grand 
Canyon, Arizona, for the squirrel on page 133; to L. A. Wilke of El 
Paso, Texas, for the jackrabbit on page 62. 
To the National Association of Audubon Societies for the photo¬ 
graph by Howard Cleaves of the opossum on page 159 and of the 
opossum family on page 154; to Nature Magazine for the pocket go¬ 
pher on page 24, the grizzly bear on page 121, and the pack rat photo¬ 
graph on page 41 by H. S. Davis; to Acme Newspictures for the 
mountain lion on copyright page and on page 45; to the Field Museum 
of Natural History for the beavers on page 107; to Frashers, Inc., of 
Pomona, Calif., for the bobcat on page 144, the buck on page 9, and 
the fawn on page 16; to Pictures, Inc., for the coyote pups on page 
65; to the Union Pacific Railroad for the brown bear facing page 9; 
to the American Museum of Natural History for the squirrel on page 
131, the bison group on page 120, and the grizzly bear on page 130; to 
Brownell Photos for the bald eagle facing page 98; to Underwood and 
Underwood for the young bald eages on page 97; to the National 
Park Service for the bighorn sheep on page 71; to the Department of 
the Interior for the bighorn sheep on page 79; to the U. S. Forest 
Service for the beaver on page 105, the coyote on page 63, the deer 
on page 17, and the deer on page 11 by A. G. Hamel; to the U. S. 
Bureau of Biological Survey for the wolverene on page 139, the 
skunks on page 80, the pack rat on page 36, the pocket gopher on the 
title page, the pocket gopher on page 27, and the grasshopper sketches 
on pages 30 and 35. 
Specific warning against copying any of the pictures, in direct vio¬ 
lation of federal law, is hereby given. 
