20 



PACIFIC COAST AVIFAUNA 



No. 14 



in the mountains these speeies disappear, and others, siieh as the White-crowned 

 Si)arro\v, the Shite-eolored Fox Spai-row, Lineohi Sparrow and PiU^olated Wari)- 

 ler, take their phiees. 



The sage-hrush association is one of the most cliaracteristie. It occupies 

 i)road fhit or slightly rolling areas, mainly in the ])rairic region of the state, and 



Fig. 6. View .\EAR Sperry C.A.M p, Glacier Nationai. Park, 



SHOWING THE TERMINAL 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. HUDSONIAN AND 



Alpine-Arctic 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 borders upon 

 the gi-ass foothill and the Douglas fir associations. The larger areas oi' this as.so- 

 elation are rapidly being eultivjited and the sage removed. ( 'onsecpiently the 

 species dependent on it are becoming scarce. The chai-acteristic species are the 

 Sage Hen, the (Jlay-colored, Brewer and Sage si)arrows, and the Sage Thrasher, 

 Other species, such as the Brewer Blackbird and Mourning Dove, sometimes nesl 



