THE 



WILSON BULLETIN 



NO. 99 



A QUARTERLY JOURNAL OF ORNITHOLOGY 

 VOL. XXIX JUNE, 1917 NO. 2 



OLD SERIES VOL. XXIX. NEW SERIES VOL. XXPV. 



SOME NOTES OF THE BIRDS OF ROCK CANYON. 



ARIZONA. 



BY F. C. LINCOLN, DENVER, COLORADO. 



(With Photographs by the Writer and J. D. Figgins.) 



The biolog-ical interest attached to the Sonoran life zones, 

 and particularly to the Lower, is readily attested by the num- 

 ber of papers and more lengthy publications treating of these 

 regions. 



But despite all that has been written, interest in these won- 

 derful areas is not flagging, nor has the subject been at ail 

 exhausted. In fact, in common with many other regions, 

 they have just been surveyed, and the work now before the 

 field and cabinet biologist may be confidently expected to 

 materially enlarge our knowledge of their flora and fauna. 

 Species will be added or eliminated ; others discovered as en- 

 tirely new to science: ranges will be extended; migrations, 

 with schedules of arrivals and departures and other move- 

 ments of a consequential character be determined ; and above 

 all, causes definitely ascertained for the existence or non- 

 existence of the many characteristic forms. 



It was accordingly with much pleasurable anticipation that 

 the writer, accompanied by Messrs J- F). Figgins and A. H. 

 Burns, pitched camp at the mouth of Rock Creek Canyon, on 

 the south side of the Santa Catalina Mountains, under large 

 palo verdes and mesquites on the afternoon of May 7th, 1910, 

 where we were delighted to find ourselves surrounded by con- 



