^'"''loi'o^ ^^] ViSHER, Birds of Pima County, Arizona. 287 



105. Dendroica graciae. Grace's Warbler.*** — Abundant nester 

 above 7000 feet in the Catalinas. This i.s a ground loving bird, hopping 

 sprightly about. A connected song which tapers off as does the House 

 Wren's is often delivered from a low perch. 



106. Dendroica nigrescens. Black-throated Gray Warbler.* — 

 Frequent migrant in the valley (March 26-April 14, September). Common 

 summer resident above 6000 feet. 



107. Dendroica townsendi. Townsend's Warbler.* — Noted in 

 March and May near Tucson, and at base of the Catahnas at middle of 

 September. 



108. Dendroica occidentalis. Hermit W.yrbler. — A pair were seen 

 along the river April 22. ''Common migrant in the Catahnas." (Lusk.) 



109. Oporornis tolmiei. Macgillivr.yy's Warbler. — Common in 

 migrations. Seen early in June near the river, apparently near its nest. 



110. Icteria virens longicauda. Long-tailed Ch.\t. — The Chat 

 arrived in great numbers late in May. At sunrise I have heard scores 

 singing simultaneously. Departed first week of September. 



111. Wilsonia pusilla pileolata. Pileolated Warbler. — Abundant 

 migrant ]\Iareli 24-Jiuie 2, August 18. The song is veiy much like that of 

 the Yellow Warbler. 



1 12. Setophaga picta. Painted Redstart. — A common summer 

 resident in the forests of the Catahnas. Nests found by Mr. Lusk at 7500 

 feet. From June 20 to September IS the immature birds were abundant 

 in the oak zone and along the canons. 



113. Cardellina rubrifrons. Red-faced Warbler.*** — Common 

 nester in the pine forest. Nest found by Mr. Lusk. 



114. Toxostoma curvirostre palmeri. Palmer's Thrasher. — Com- 

 mon resident below 4000 feet. Mr. Couch was correct in saying that the 

 song is "remarkably melodious and attractive," and because it is soft and 

 not very frequent it is all the more pleasing. 



115. Toxostoma bendirei. Bendire's Thrasher. — Abundant resi- 

 dent about Tucson. Song resembles that of the Brown Thrasher. The 

 song season is over by niid-April, and the young then fledged. The birds 

 of tliis region do not seem to adapt their nesting period to the rainy seasons. 

 There is a small amount of rain in December and January; then everything 

 slowly dries up until July and August when considerable rain falls. In 

 these months the insect life and all other food is far more abundant than 

 before. One would think that the birds of this region would therefore have 

 their young hatched early in July instead of in May. Characteristic 

 desert birds which bring out their broods early are: 



Mid-April: Bendire's Thrasher and Cactus Wren (the latter occasionally 

 rears a second brood in August). 



Early in May: Plumbeous Gnat-catcher. 



Mid-May: Say's Phoebe, Vermilion Flycatcher, Desert Sparrow. 



End of May: Mourning Dove. Bullock's Oriole, House Finch, Lutescent 

 Warbler. 



