LIST OF TIIK BIRDS OF EASTERN NORTH AMERICA. 357 



A. o. u. Genus HALIAETU5. SAVKi. 



NO. 



284 (:5ol) HALIAETUS ALBICILLA. (Linn.) Gray Sea Eagle. 



Occurs iu Greenland, but has not beau taken in the I'nitod States. 



285 (352) HALIAETUS LEUCOCEPHALUS. (Linn.) Bald Eagle. 



Throughout North America to northern Mexico ; breeding throughout its 

 range, 



Mr. C. H. Towusend has hitely separated the northern and southern birds, 

 giving the range of Ilrdutetiis leiicorcphalns as practically restricted to the 

 United States. To the bird which occurs iu the British possessions west 

 to Alaska, which is larger, he has given the name .of IlaUa'etus lencoccpha- 

 lus alascanus, Xorthern Bald Eagle. 



Subfamily FALCONIN/C. Falcons. 

 Genus FALCO. Linn. 



286 (353) FALCO ISLANDUS. Buinn. White Gyrfalcon. 



Arctic America ; south in winter to Labrador and northern Maine. 



287 (354) FALCO RUSTICOLUS. Lynn. Gray Gyrfalcon. 



Arctic America ; accidental iu winter as far south as Maine. 



288 (354a) Falco rusticolus gyrfalco. (Linn.) Gyrfalcon. 



A grayish race with faintly barred back ; occurs in Arctic America ; 

 accidental in winter in New England (Massachusetts and Rhode 

 Island ) . 



289 (354?;) Falco rusticolus obsoletus. (Gmel.) Black Gyrfalcon. 



A dark race with back dark slate ; sometimes almost black and not 

 barred ; underparts dark ; it occurs in Labrador ; accidental iu 

 winter as far south as Canada. Maine, Massachusetts, and New 

 York. 



290 (355) FALCO MEXICANUS. S( in i:(.. Prairie Falcon. 



Western species ; casual in Illinois ; breeds throughout its range. 



Subgenus RHYNCHODON. Nitzs< ii. 



291 (350) FALCO PEREGRINUS ANATUM. (Bonai.) Duck Hawk. Peregrine 



Falcon. 



North America antl northern South America; breeds througliout its 



range. 



Si i;(;i:n(s /ESALON. K \tr. 



292 (357) FALCO COLUMBARIUS. Linn. Pigeon Hawk. 



North America, West Indies, and northern South .Vmerica ; breeds from 

 nortiiern border ol" I'liited States, northward. 



293 (;i5.si) pALCO REGULUS. I'aii. Merlin. 



iMiropean species; recorded iVoiii (ireeiiland. 



Si-iic.KNi-s TINNUNCULUS. Linn. 



294 (351)') FALCO TINNUNCULUS. Linn. Kestrel. 



Kuropeaii speeit's ; once taken in Massachusetts. 



