^°'i'9^4'^^] Bailey, Birds of the Upper Pecos. 363 



line on straggling dwarf spruces at 12,600 feet. At our Hudsonian zone 

 camp at 11,600 feet we saw a number of the birds up to the time of our 

 departure, on August 17. On our way down the mountains we found it as 

 low as Sooo feet, whether having bred there or having come down after 

 the cold storms we could only surmise. 



Hylocichla guttata auduboni. Audubon Hermit Thrush. — When we 

 camped in the spruces at 11,000 feet Hermit Thrushes were singing in 

 chorus in such unusual numbers that we called the place Hylocichla Camp, 

 but by August i the thrushes had almost stopped singing. On July 23 

 we found a young bird out of the nest, and from that time on encountered 

 bob-tailed j'oung in the woods until August 15, just before our departure 

 for the lowlands. The stomach of a thrush shot contained insects and a 

 few berry seeds, probably strawberry. 



Merula migratoria propinqua. Western Robin. — Mr. Henshaw says 

 the Robin "was not detected breeding, although it probably summers 

 here." During our stay the birds were found from Pecos to the foot of 

 Pecos Baldy. At 8000 feet, on July 15, we found young being fed out of 

 the nest ; on July 16 we found a pair just about finishing a nest ; on July 

 23 a nest was seen with eggs at 11,000 feet; on August 20, young were 

 found being fed in the nest at 8000 feet. On August 16, at 1 1,000 feet, we 

 saw a tailless old bird in the midst of its molt. 



Sialia mexicana bairdi. Chestnut-backed Bluebird. — On July 10 

 (5rt/><// was found nesting in a cottonwood near Glorieta. In the moun- 

 tains it was seen as high as 10,200 feet. 



Sialia arctica. Mountain Bluebird. — Mr. Henshaw says, "Appar- 

 ently the Sialia arctica does not breed here"; but Mr. Mitchell gives it 

 as breeding "up to 9000 feet" on the east of the range, and we found it 

 common at Glorieta July 8 and on the open mesa at 10,300 feet, where 

 we found a nest in an aspen on July 25. At the same time families of 

 young and old were going about together up at 11,000 feet. By August 

 5, numbers of Bluebirds, with Flickers, Chipping Sparrows, and Juncos 

 were wandering about in families, the woods as well as the meadows being 

 filled with birds. On August 11 we found a flock of the Bluebirds with 

 Chipping Sparrows and Flickers at 12,300 feet, on a protected slope in the 

 dwarf evergreens of timberline on the south side of Truchas. 



