

1890.] Mearns, Arizona Mountain Birds. AQ 



borealis, Contopus richardsonii, Empzdonax difficilis, Cyano- 

 citta stelleri macrolopha, Perisoreus canadensis capitalis. 

 Corvus americamis, Picicorvns columbianus, Cyanocephahts 

 cyanocephalus, Xanthocephalus xanthoccphalus, Stumella 

 magna neglecta, Scolecophagus cyanocephalus, Coccothraus- ^J^ 

 tes vespertina, Carpodacus cassini, Lencostictc australis, Spi- **'"* | 

 nus pimts, Spimis psaltria, Pooccetes graminens cotijinis, 

 Zonotrichia leucophrys, Spizella socialis arizonce, Pipilo chlo- 

 rurus. Habia 7nela?iocephala, Pi'ranga ludoviciana, Progne 

 sitbis, Tachycitieta thalassina, Virco gilvus szuainsoni, Vireo 

 solitarius plnmbeus, Dendroica audnboni* Salpinctes obsole- 

 tus, Troglodytes aedon aztecits, Certhia familiaris montana, 

 Sitta carolinensis aculeata, Sitta canadensis, Sitta pygnura, 

 Partes gambeli, Regulus calendula, Turdus aonalaschkce aitdn- 

 boni ', Merula migratoria propinqua, Sialia arctica. 



In connection with this group of Rockv Mountain birds it 

 should be remarked that the alpine mammals of these parts of 

 Arizona afford an even more striking illustration of the southern 

 extension of the Rocky Mountain fauna, as they are chiefly* sed- 

 entary species, occupying these peaks and elevated ridges through- 

 out the year. The mammalian family Sciuridae furnishes an 

 interesting example : several Rocky Mountain forms — Sciurus 

 abcrti, S. hudsonius mogollonensis,~\ Tamias asiaticns quadri- 

 vittat?is and T. lateralis — have their range in this region re- 

 stricted to the high mountain-tops, where they are exceedingly 

 plentiful. These highest points would appear, upon a map 

 representing the geographical distribution of these species, as a 

 chain of small islands in a sea having a widely different faunal 

 character. 



The flora of this region, which has been recently investigated, 

 affords an exactly parallel case, these mountains appearing like 

 islands in a region of more southern floral aspect. 



The following species of mountain birds extend their habitat from 

 northern Mexico into the mountains of this region : — Meleas^ris 

 gallopavo mexicana, Myiarchns laxvrencci olivascens, Doxia 

 curvirSttra stricklaudi, Piranga Aepatica, Dendroica oliva- 



* Several of the larger animals, as the antelope, deer, and bears, descend to the 

 lower valleys and mesas during the severest winter weather. 



t A form of the red squirrel, intermediate between the common eastern chickaree 

 and vax.frenwnti of the southern Rocky Mountain region. 



