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 Sept ,1911 SOME BIRDS I' TH] SAN QUENTIN BAY REGION, CALIFORNIA 153 Bell Sparrows (Amph[spiza bell[) were sparingly scattered in pairs over the plain, and in July they were in family parties aud easily the commonest bird. Iu the former n[onth Western Martius (Zrogne s. hesper/a) were arouud the water-holes, as were several Tree Swallows (]m'doprocne bicolor), while Barn (15firundo erylhrogaslra) and Cliff Swallows (Pelrochelidon htnt)'ons) were set- ting up house-keeping in the village. Two pairs of Rough-winged Swallows (S2el- gidopleryx serripennis) were found breeding in the bank along the bay, and as far as I can ascertain, this is the first time that the latter species has actnally been found breeding on the peninsula, although it apparently does so clear to Cape San Lucas. California Shrikes (Lanius 1. gainbell) are c6mmon resideuts here, and far up into the mountains. The warblers were represented by one each of the Yellow (probably Dendroica a. brewsleri, although I am not sure), aud the Black- throated Gray (9. niresccns), both of which were seeu in the pepper trees not a lmndred yards from the shore. Mearns Thrasher (7bxosloma c. mearnsi) is the resident subspecies 'beyond a doubt, but the three individuals which I saw in the heavier brush were so wary that I was unable to get a shot at them. The 1910 A. O. U. Check-list gives the range of this form as "Lower Sonoran Zoue", but in the San Pedros, February 1908 I found them to be tolerably common nearly to the higher linfit of the Upper Souoran Zone where I discovered an incomplete set of two eggs and an unfinished nest. These were among straggliug pines on the beuch-laud at over three thous- aud feet. Pallid Wren-tits (CYtamaea./'. henshaw[) were occasionally seen, and Western Gnatcatchers ( Poh'oplila c. obscura) were common. SOME COLORADO HORNED OWL NOTES By EDWARD R. WARREN WITH ONE PHOTO R. KEYES'S paper in the January CosI)O, "A History of Certain Great Horned Owls", brought to my mind my own experience with a family of the Western Horned Owl (tubo w'rgz'nianus pallscens) near Paonia, Delta County, Colorado. While some accouut of these was published iu the l'ilson ttdlelin for September 1903, (A Nest of the Western Horned Owl), I have veutured to rewrite my recollections, and add a few other notes thinking they may prove interesting. Paonia is situated in the valley of the North Fork of the Gunnison River, at an altitude of about 5,700 feet. The valley itself is quite wide, with mesas on either side, and then low hills gradually increasing iu altitude. In the valley, where not cultivated, are sagebrush and greasewood, with cottonwoods along the river; on the hills are cedars and pinyons. The soil is largely au adobe, which when eroded forms more or less substantial cliffs or bluffs. The nest was iu a uiche in the face of au adobe bluff a couple of miles up the North Fork Valley from the town. Tlis bluff was somewhere about forty feet high, and the nest-site a little nore than half way below the top. I was told that the birds had nested there for several years. It was on the eighth of May, 1901, that I made my first visit. As my friend and I approached the bluff we saw one of the parent birds sitting at the mouth of the hole, but it flew away before I had a chance