n summer resident; in
spite of its name, a bird of the plains rather than the mountains; yet
sometimes found in parks at an altitude of 8,000 and even 9,000 feet.
Its numbers may be estimated from the fact that in one day of August a
sportsman shot one hundred and twenty-six birds, though why he should
indulge in such wholesale slaughter the author does not understand.

283. =Turnstone.= ARENARIA INTERPRES. Rare migrant; breeding grounds in
the north; cosmopolitan in range, but chiefly along sea-coasts.

289. =Bob-white.= COLINUS VIRGINIANUS. Resident; somewhat common
locally; good reason to believe that all the quails of the foothills are
descendants of introduced birds, while those of the eastern border of
the plains are native. A few were introduced some years ago into Estes
Park, and are still occasionally noticed.

293. =Scaled partridge.= CALLIPEPLA SQUAMATA. Resident; common locally;
southern species, but more common than the bob-white at Rocky Ford, Col.

294. =California partridge.= LOPHORTYX CALIFORNICUS. Resident, local;
introduced at Grand Junction, Col., and have flourished so abundantly as
to become troublesome to gardeners.

295. =Gambel's partridge.= LOPHORTYX GAMBELII. Resident, rare; known
only in southwestern part of the State; a western species.

297. =Dusky grouse.= DENDRAGAPUS OBSCURUS. Resident; mountain dwellers;
breed from 7,000 feet to timber-line; in September wander above
timber-line to 12,500 feet, feeding on grasshoppers; remain in thick
woods in winter.

300b. =Gray ruffed grouse.= BONASA UMBELLUS UMBELLOIDES. Rare resident;
a more northern species, but a few breed in Colorado just below
timber-line; winters in higher foothills.

304. =White-tailed ptarmigan.= LAGOPUS LEUCURUS. Common resident; one of
the most strictly alpine species; breeds entirely above timber-line from
11,500 to 13,500 feet; thence ranging to the summits of the highest
peaks. Only in severest winter weather do they come down to timber-line;
rarely to 8,000 feet. In winter they are white; in summer fulvous or
dull grayish-buff, barred and spotted with black. This bird is
colloquially called the "mountain quail." The brown-capped leucosticte
is the only other Colorado species that has so high a range.

305. =Prairie hen.= TYMPANUCHUS AMERICANUS. Resident; uncommon and
local.

308b. =Prairie sharp-tailed grouse.= PEDIOECETES PHASIANELLUS
CAMPESTRIS. Resident, not common; once common, but killed and driven out