Mar,, 1912 
A WEEK AFIELD IN SOUTHERN ARIZONA 
61 
lotus). I spent some time looking for the nests of the latter but was not success- 
ful. There were, apparently, two pairs of them aliout one hundred yards apart. 
The occurrence of this bird at this season was very much of a surprise to me. 
There were numerous Killdeer along a small .stream flowing from a spring in 
this flat, and I walked up .so quietly 1 almost stepped on one before she saw me 
and left her nest and three pretty eggs. Several nests of White-necked Raven 
about ready for eggs were found in the mesquites, but we were a little early for 
eggs. Resuming our journey we crossed through IMescal gap where we saw 
Scott Orioles (Icterus parisonuu) and Western Lark Sparrows (CIwudcstcs 
grauiinacus strigatus), but as we were in a hurry to reach the San Pedro river at 
Fairbanks for a little collecting we did not stop to look for nests. We arrived 
Fig. LS. ne.st of g.^mbee ouaie, .at the foot of .4 mesouite bush 
there about one o’clock, and after lunch put in the balance of the day along the 
banks of the river. In a small mixed grove of cottonwoods and willows I found 
two nests of Traill Flycatcher (Euipidoua.r trailli) with three fresh eggs in each. 
Also collected a set of four Lucy Warbler eggs from a hole in a low dead willow 
stump. Incubation was far advanced. The female was flushed but did not make 
much of a demonstration and disappeared entirely before I had finished taking 
a photograph of the nesting site. 
Sonora Yellow Warblers were quite numerous and I took one set of three 
eggs from a nest fifteen feet up in a slender willow. Two nests of young Costa 
Hummers (Calypte costae ) were also found here. One held newly hatched young 
and the other, young about grown. 
