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 92 THI CONDOR Vol. XIV ' there a young bird about a third grown, and one about the sme size was seen next day at Lake John. July 21 Durand saw a hen with four chicks near Walden, and on the 22nd while on the road en route for Buffalo Pass we saw two hens each with two fair sized chicks, about fifteen miles southwest of Walden. Many of these birds must winter about Walden, for there were piles of their old drop- pings everywhere in the sage brush near that place. 22. Zenaidura macroura carolinensis. Mourning Dove. This bird was common everywhere from the time I left Colorado Springs until near Log Cabin P. O., after which we saw no more until about twelve miles south of Walden. A few were seen at about every place we visited in the North Park. It was seen at Steamboat Springs, and along the road in Routt and Grand Counties, and between Idaho Springs and Denver. One was seen on its nest in a cottonwood tree on Wild cat Creek, June 3. 23. Cathaltes aura septentrionalis. 'I'urkey Vulture. This species was seen on two occasions, May 23, about two miles east of Fondis, and June 14, near Owl CanyoB, northwest of Fort Collins. 24. Circusl hudsonius. Marsh Hawk. Marsh Hawks were not.seen as frequently as I iwould have expected, but a few being noted, as follows: near Ramah, Mattiso, about eighteen nailes south of Fort Morgan, and three miles north of that plaice, at Steamboat Springs, and ten miles south of there. 25. Buteo borealis calurus. Xestern Red-tail. This species was seen quite frequently,[ though I made but one note of it on the plains, and that really from the Divide, near Elbert, where a pair were seen. The next ocdlion was July 17, two miles above Home P. O., when we were getting well into the mountains. It Was noted between that place and Chambers Lake, and at the lat- ter place; fifteen miles south of Walden; near that place; near Hell Creek; at our Mt. Zirkel damp; at the Buffalo Pass sawmill; at Buffalo Pass; Steamboat Springs and a fw miles south. One perched on a fence post on the divide between Yampa and Egeria Park dropped a half-eaten Wyoming Ground Squir- rel (Citellus ele,ans) as it flew off. One was seen on the Gore Pass road near Rock Creek. 26. Buteo swainsoni. Swainson Hawk. This is more a bird of the open ground than the preceding, and seen more frequently on the plains. It was noted at Elbert and near there; two, presumably a pair, were seen at Cedar Point; it was seen May 29 between Godfrey and Deer Trail; May 30 we saw two recently killed birds at a anch by the roadside; Durand saw one hanging about ttfe East Pawnee Butte; one seen near Briggsdale. Two or more were seen at Walden at various times; at this place I found where one had been eating a Citeflus elegans. These large hawks must destroy many of these pests during the summer as in the North Park they seemed to hang about where the ground squirrels were most abundant. It was seen at Hell Creek and at Steamboat Springs. 27. Archibuteo ferrugineus. Ferruginous Rough-leg. One seen be- tween Briggsdale and Ault, June 11. Several large hawks were seen while on the plains, flying too high for identification, some of which may likely enough have been this species. July 22, in the North Park, between two forks of Grizzly Creek, a Rough-leg in the ordinary light phase was seen on the ground, and at the same time a very {lark colored hawk was flying about overhead, which may have been a melanistic example of the same species, or possibly B. swainsoni. It was too far away for any positive identification.