114 LAND BIRDS 
292. MOUNTAIN PARTRIDGE. — Oreortyx pictus. 
Famity: The Grouse, Partridges, Quails, ete. 
Length: 10.00-11.12. 
Adult Male: Crest black ; back and upper parts olive-brown, striped 
on sides of back with light brown; top of head and entire breast 
slate-color; throat and sides dark red-brown; sides barred with 
black and white. 
Adult Female: Crest shorter, otherwise like male. 
Young : Upper parts grayish brown, speckled with white; breast gray, 
with wedge-shaped white spots ; a whitish line over the ear; belly 
white; sides washed with chestnut. 
Geographical Distribution : Humid transition zone of Pacific coast region, 
from about latitude 35° to Southern Washington. 
Breeding Range: Nearly coincident with its habitat. 
Breeding Season: April and May. 
Nest: A slight depression in the ground, lined sparingly with dry 
leaves ; placed beside or under a fallen tree or a bush. 
Eygs: 8 to 18; plain light buff. Size 1.36 X 1.02. 
THe Mountain Partridge of the coast belt is so nearly 
like the plumed partridge of the Sierra Nevada in habits 
and coloring as scarcely to need a separate description. 
Both are designated as “mountain quail” in the com- 
mon parlance, and it is about as difficult to obtain a 
satisfactory. view of one as of the other. The plumed 
partridge is said to measure a trifle less than this species, 
but in the field the only distinguishing marks are the 
grayer tone of the back and the bluish nape, all of which 
makes it difficult to differentiate the species. The 
Range is possibly the best guide for an amateur in iden- 
tifying the species. 
(For habits see “ Plumed Quail.””) 
