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PATAGONIAN EXPEDITIONS : ZOOLOGY. 



dark streaks ; under wing-coverts nearly white, the outer series blackish 

 terminally, forming a characteristic spot on the almost white lining of the 

 under wing; axillaries silvery buff. 

 Bill horn-blue, dark in shade. 



Fig. 347. 



Asia flammeus, showing the feathering of the foot. Natural size. 



Feet feathered, immaculate buff in color. 



Iris : Orange to lemon-yellow in varying shades. 



The adults do not vary in color with the sex, the males and females 

 being indistinguishable in this respect. 



Young birds in the first plumage are generally deeper colored than are 

 adults and more uniform as to markings. 



Nestlings in the down are buff-yellow in color, darker about the face, 

 and the quills, as soon as they develop, show the characteristic marks. 



There is a wide variation in individual birds of this species and what 

 may be termed a dark phase can be discriminated. In such the buffy 

 areas become so rufescent as to give the general effect of a much darker 

 bird. The plan of coloring is however the same. 



Geographical Range. — Both hemispheres ; tropical, temperate regions, 

 extending in the north into the Arctic Circle, the Sandwich Islands and the 



