DIKECTORY TO BIKD8 OF EASTERN NORTH AMERICA. 150 



darker. Northern Europe, Grreenland and Arctic America 

 south to northern Labrador; rare in winter in Mass. andR. I. 

 2**. BLACK GYRFALCON, H. g. obsoletus. Much 

 darker than 2*. with the light interspaces below narrower 

 than the dark, sometimes nearly obsolete; above, nearly uni- 

 form dusky. Labrador, south in winter rarely to Canada, 

 Me., Mass., and N. Y. 



b. Noble Falcons. JRhyncliodoii. 



Smaller than a, dark above and whitish below more or 

 less banded on both surfaces with dark-brown ; young with- 

 out bands above and streaked below; black patch on side of 

 head. 

 Fig. 19.3. Fig. 194. Fig. 195. 



S, B, a, 1 



1-6. S, B, c, 1. 1-6. 

 18.00 ; dark slaty above. 



lir- ^ 



S, B, b, 1. 

 1. DUCK HAWK, R. anatum. 

 top of head, black ; creamy-white below transversely banded 

 behind only, fig. 194. Young, dark-brown above, reddish- 

 white below. N. A., breeding locally throughout the U. S., 

 nesting usually on cliffs ; migrates south in Sep. and Oct. to 

 winter from Fla. southward into South America. Flight, 

 swift with rapid wing-beats, seldom sailing. Captures its 

 prey, usually birds, on the wing. Eggs, 3 or 4, creamy-white 

 very thickly mottled with dark-brown. Not very common. 



