often not well developed in birds of the year. ‘Instances where one 
leg is knobbed and the other smooth are usually males, and double 
knobs on one or both legs have been observed. Length 34 cm. (13% in.), 
wing 155-165 mm., tail 88-95 m. 
Female 
Color pattern almost indistinguishable from the male; 
slightly smaller and usually without or with only a suggestion of 
knobs on the legs. 

Colorado Game and Fish Department 
Figure 1 -- Comparison of two red-legged partridges with a 
chukar partridge. 
Subspecies differentiation 
The color patterns of the two subspecies in Spain are often 
sufficiently distinct to permit fairly easy differentiation. 
-Alectoris rufa hispanica, from northern and western Spain, 
is considerably darker on its upper and under parts, while more 
slatish and less olive-brown on rump and upper tail coverts than is 
its more’ southern counterpart. The brown patch is also more 
pronounced and begins further forward on the top of the head. 
