20 



PACIFIC COAST AVIFAUNA 



No. 14 



in tlic mountains these species disappear, and others, such as the White-crowned 

 SpaiTow, the Slate-colored Fox Sparrow, Lincoln Sparrow and Pileolated Warli- 

 ler, take their places. 



'r\]f sa^-e-brnsh association is one of the most characteristic. It occai)ies 

 hi-oad I'hit or siightl.v rolling areas, mainly in tlie i)rai)'ie region of the state, and 



Fig. 6. View near Sperry Cam p, Glacier National Park. 



SHOWING THE TERMIN.\L MORAINE OF A SMALL GLACIER. AL- 

 PINE FIRS GROWING IN THE FOREGROUND, A SMALL WATER- 

 FALL FROM THE GLACIER ABOVE THE MORAINE, AND A POR- 

 TION OF THE GLACIER IN THE DISTANCE. HDDSONIAN AND 

 AlPIXE-AHCTIC ZONES. A SHORT DISTANCE ABOVE THIS POINT 



is the breeding ground of ptarmigan, pipits and rosy 

 Finches. August, 1915. 



in places extends into the lower mountains on south slopes, where it l)orders upon 

 the grass foothill and the Douglas fir associations. The larger areas of this asso- 

 ciation are rapidlj^ being cultivated and the sage removed. Consequently the 

 species dependent on it are becoming scarce. The cliaracteristic species are the 

 Sage ITen, tlie Clay-colored, Brewer and Sage sparrows, and the Sage Thrasher. 

 Other sjiecies, such as the Brewer Blackbird and ^Mourning Dove, sometimes nest 



