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May, 1912 SOME NORTH-CENTRAL COLORADO BIRD NOTES 91 anything like the anxiety the other had just a week previously. The young we saw that day all seemed to be about the same age. Sometimes we saw a single adult squatting in the shade of a fence post, and one young bird was seen in a similar position. A few were noted between Ault and Fort Collins the next day. One was seen July 5 about three nailes southeast of Lake John, which acted as if it might have young, but a thorough search failed to scare up any. 19. Dendragapus obscurus. Dusky Grouse. Not as many Grouse were seen as I should have expected. One was seen near Hell Creek. Two females with one or more young each ?vere seen near our Mt. Zirkel camp. One of these young appeared to be about two weeks old, that belonging to the other bird was ?ig. 35. YOUNG OP THE ALPINE THREE-TOED WOODPECKER, JUST OuT OP THE NEST considerably larger. This was July 12-15. July 28 seven Grouse were seen on the Routt County side of Buffalo Pass about two miles from the summit. 20. Lagopus leucurus. White-tailed Ptarmigan. A single Ptarmigan was seen July 10 on Mt. Zirkel, the only one we saw the whole trip. I was greatly disappointed, for I had counted on finding them plentiful there, and on securing a good series of photographs. Durand reported finding much sign of them on Sawtooth, near the Cameron Pass camp. 21. Centrocerus urophasianus. Sage Grouse. This species was seen only in the North Park. Near our camp at Hell Creek we saw a flock of fifteen adults, which appeared to be all males. July 5 ?ve saw about two miles from