. A history of the birds of Colorado . beUy and legs white, sometimes yellowish and discoloured,the white of the tail partially hidden by the long coverts; iris hazel,comb over the eye red, biU black. Length 12-0 ; wing 6-75 ; tail 4-5 ;bill -37 ; tarsus 1-20. In late summer after the post-nuptial moult, the dark parts aremore uniformly grey with finer markings; in winter pure whitethroughout. The moults take some Uttle time to complete, so thatspecimens in every intermediate stage are frequently met with (seePlate 3). Distribution.—The Rocky Mountains at high elevations, chiefly abovetimber l

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. A history of the birds of Colorado . beUy and legs white, sometimes yellowish and discoloured,the white of the tail partially hidden by the long coverts; iris hazel,comb over the eye red, biU black. Length 12-0 ; wing 6-75 ; tail 4-5 ;bill -37 ; tarsus 1-20. In late summer after the post-nuptial moult, the dark parts aremore uniformly grey with finer markings; in winter pure whitethroughout. The moults take some Uttle time to complete, so thatspecimens in every intermediate stage are frequently met with (seePlate 3). Distribution.—The Rocky Mountains at high elevations, chiefly abovetimber line, from British Cpliunbia south to the Cascade range inOregon and the Taos range in New Mexico. This Ptarmigan is fairly abundant throughout the higher mountainranges of Colorado, and is a resident there aU through the year. Itbreeds above timber line from about 11,500 feet to the summits of themountains, while in winter it stays about timber line though sometimesdriven down to lower levels, perhaps 9,000 feet, by heavy storms. It. Plate 3]

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, bookyear1912