92 



PACIFIC COAST AVIFAUNA 



No. 10 



RESIDENT 



Otus a. cineraceus 

 Dryobates arizonae 

 Melanerpes f. aculeatiis 

 Tyrannus vociferans 

 Aphelocoma woodhousei 

 Aphelocoma ^. arizonae 



7. Aimophila r. scotti 



8. Vireo h. stephensi 



9. Baeolophus i. griseus 



10. Baeolophus wollweberi 



11. Polioptila c. obscura 



The Upper Sonoran zone occupies a comparatively limited area in the state, 

 and the list of birds confined to it solely is a short one. In southern Arizona this 

 zone is in few places of greater width than is comprised in the belt of live-oak- 

 covered foothills between the higher mountains and the valleys below. Of the 

 seventeen species listed as peculiar to this zone, eleven are preeminently birds 

 of this live-oak association, as follows : Otus J. cineraceus, Dryobates arizonae, 

 Melanerpes f. aculeatus, Tyrannus vociferans, Myiarchus I. olivascens, Aphelo- 

 coma zvoodlwusci, Aphelocoma s. arizonae, J^ireo h. stephensi, Baeolophus i. 

 griseus, Baeolophus zvolhveberi, Polioptila c. obscura. 



Of the remaining six, Cynaitthus latirostris, Myiochanes r. ricliardsoni, and 

 I'ireosyk'a g. szvainsoni are to a great extent denizens of the sycamores along 

 the caiion streams in the foothills. Icterus parisorum and Aimophila ruHceps 

 scotti frequent the agave and scrub-oak covered hillsides, while Fireo z'icinior 

 is in the denser brush of the same region. 



Species in the Transition Zone and Higher, more neari-v Related to the 

 Rocky Moi'ntain Fauna to the Northwaud 



SUMMER VISITANT 



Vermivora virginiae 

 Dendroica a. auduboni 

 Dendroica gracicC 

 Dendroica nigrescens 

 Wilsonia p. pileolata 

 Hylocichla g. auduboni 



Loxia c. stricklandi 

 Spinus pinus 

 Pipilo m. montanus 

 Troglodytes a. parkmani 

 Certhia f. montana 

 Sitta canadensis 

 Sitta p. pygmaea 

 Penthestes g. gambeli 

 Regulus c. calendula 

 Myadestes townsendi 

 Planesticus m. propinquus 

 Sialia m. bairdi 

 Sialia currucoides 



