168 THE CONDOR Vol. XX 



degree of surety that was surprising to myself. The number of eggs to be ex- 

 pected, the shape, shade of ground color, and style of markings could be given 

 with great accuracy. The general characteristics of the nests, whether com- 

 pact, deeply cupped and neatly finished, or the opposite, were also readily 

 "called" before the nest was seen. The actions of the different pairs around 

 the nests, etc., were all corroborative to an extent that seemed to justify my as- 

 sumption that the same individuals were there each year. Among the other 

 flycatchers, the Buff-breasted (Empidonax f. pygmaeus), Traill (Empidonax i. 

 trailli), Arizona Crested (Myiarclms m. magister), Ash-throated (Myiarchus 

 cinerascens) , Sulphur-bellied (Myiodynastes luteiventris), and Olivaceous {Myi- 

 archus I. olivascens) , could all be used to further strengthen my conclusions. 



Hummingbirds also may be cited. One certain Rivoli Hummingbird (Eu- 

 genes fidgens) always built in a certain small sycamore or in a neighboring ma- 

 ple. Unless disturbed before the eggs were laid I could count on a set from this 

 bird. However, if disturbed before the eggs were laid she left that locality and 

 I could not find where she then built; but the next year was sure to see her back 

 to the old homestead again. A Blue-throated Hummingbird (Coeligena clemen- 

 ciae) built nest after nest on the same hook. One that I collected showed four 

 stories at least. When I took it I put another hook in its place and had the pleas- 

 ure of photographing the young raised in a nest built on it. Broad-tailed (Selas- 

 phorus platycercus) and Costa (Calypte costae) hummingbirds also helped me 

 along to a certain extent. One of the latter always built on a hammock hook 

 hanging from a rafter in the porch of a neighbor's house. Another always built 

 on the same branch of an ash tree near the San Pedro River. 



Among the warblers, Sonora Yellow (Dendroica aestiva sonorana) and the 

 Lucy (Vermivora luciae) were particularly convincing. Not only did they se- 

 lect the same vicinity for their nests each .year, but the type of the eggs was so 

 consistently the same that even an unwilling observer would have had to ac- 

 knowledge the strong probability that what I am trying to demonstrate was a 

 fact. Painted Redstarts (Setopliaga picta) were also good ones to count on. The 

 other warblers were so rare and hard to find that they would hardly prove con- 

 vincing, though both Grace (Dendroica graciae) and Olive (Peucedramus oliva- 

 ceiis) warblers could be observed in the same bit of forest each year. 



In one certain clump of fir trees I could always count upon finding two 

 pairs of Western Evening Grosbeaks (Hesperiplwna v. montana) though I was 

 not always successful in finding both nests. This I believe was largely because I 

 was not persistent enough. A pair of Western Tanagers (Piranga ludoviciana) , 

 could also be counted upon here. In fact, this group of trees bears me out in my 

 belief with the following list which I could always find here. Besides the two 

 mentioned, there were Western Robin (Planesticus m. propinquus), Cones Fly- 

 catcher (Contopus pertinax pallidiventris), Western Wood Pewee (Contopus 

 richardsoni), Cassin Kingbird (Tyrannus vociferans), Plumbeous Vireo (Lanivi- 

 reo s. plximbeus) , Hepatic Tanager (Piranga hepatica), and Long-crested Jay 

 (Cyanocitta s. diademata). Across the trail, but near enough to be listed with 

 the others, was a pair of Western Warbling Vireos (Vireosylva g. swainsoni) . I 

 t'ind that my notebook also tells me to look for one pair each of Arizona Junco 

 (J unco phaeonotus palliatus), Red-faced Warbler (Cardellina rubrifrons), Vir- 

 ginia Warbler (Vermivora virginae), Western House Wren (Troglodytes aedon 

 parkmani), Canyon Wren (Catherpes m. conspersus), and Painted Redstart 

 (Setopliaga picta) in this immediate vicinity. By immediate I mean within a 

 radius of one hundred yards. 



