LIST OF ILLUSTRATIONS. 
Portrait of General William Jackson Palmer Frontispiece 
PLATE. PAGE 
1. Nesting Colony of Great Blue Heron . 3 82 
2. ie Great Blue Heron . : : ‘ \ 88 
foung Night-Herons : : : 
Ptarmigan in September and March . . 148 
Nesting Site of Western Redtail : . 174 
5. Adult and Young of Rocky-Mountain Screech 
Owl . ‘ ; : “i ‘ . 204 
6. Nest of Western Horned Owl . : . 210 
7. Young Red-shafted Flickers ; : . 240 
8. Nest of Broad-tailed Humming-bird . . 254 
9. Arkansas Kingbird and Nest. . . 262 
10. Horned Lark in the Snow : : . 280 
11. Magpies from the Nest. : ; . 284 
12. White-headed Jay . ; ‘ . 290 
13. Nest of Yellow-headed Blackbird : . 3804 
14. Nest of House-Finch and Arkansas Goldfinch 332 
15. Black-headed Grosbeak on the Nest . . 400 
16. Nest of American Dipper . : ; . 476 
Contour Map of Colorado : : 2 . 852 
