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May, 1912 SOME NORTH-CENTRAL COLORADO BIRD NOTES 93 28. Falco mexicanus. Prairie Falcon. There were two pairs of Prairie Falcons at Pawnee Buttes, both nesting. One bird was seen at the nest on the side of the West Butte, and the other pair were nesting in the line of bluffs to the west of the Buttes. From a point some little distance off we could see into the cavity under the overhanging rocks, and with field glasses were sure we saw two eggs. The place itself was well marked by the white streaks of droppings down the side of the rock, and the birds manifested much anxiety when we were on the rocks above the spot. June 17 we thought we saw one near Log Cabin P. O., Larimer County. 29. Falco sparverius phal,ena. Desert Sparrow Hawk. This was about the most common hawk met with. It was seen frequently between Colorado Springs and Ramah, and also between Godfrey and Deer Trail; near Briggs- dale; northwest of Fort Collins; Home P.O.: Hell Creek; Lake John; near Mt. Zirkel; at Grizzly Creek. North Park: Steamboat Springs; and frequently along the road between that place and Golden, being decidedly common at times. 30. Speotyto cunicularia hypog?ea. Burrowing Owl. This species was Fig. 36. WESTI?RN NIGttTHAWK ON FENCE POST seen rather frequently on the plains from near River Bend to a few miles north- west of Fort Collins. May 30 we dug out a nest, or rather the other two did, while I bossed. It was, as usual, in an abandoned prairie clog hole, and eight fresh eggs were found, being five feet in from the mouth of the burrow, and three feet below the surface of the ground. The female was captured on the nest. 31. Ceryle alcyon. Belted Kingfisher. The first seen was on a small stream between Livermore and Log Cabin; then near Home P.O.; at Chambers Lake; Walden; at the upper bridge on the North Platte: at Steamboat Springs and eighteen miles south: Grand River. twelve miles above Kremmling. 32. Dryobates villosus monticola. Rocky Mountain Hairy Woodpecker. One seen May 23 at Bijou Creek, one near Chambers Lake, one at our Cameron Pass cmnp, and at Buffalo Pass sawmill. 33. Picoides americanus dorsalis. Alpine Three-toed Woodpecker. Our best find in the way of birds was probably the family of this species we found close to our Buffalo Pa?s camp. They had a nest in a dead Engelmann spruce,