FALCO PEREGRINUS : DUCK HAWK. I I I 



gyffalco''' of Allen, Bull. Essex Inst, x, 1878, p. 21, No. 

 164, belong here or to the next form .'') 



F. gyrfalco islandicus. Rhode Island, one specimen, 

 near Providence, winter of i864-'5 : Allen, Am. Nat., 

 iii, 1869, p. 513 ; this specimen, given by Allen as F. 

 sacer, has since been identified with islandicus; see 

 Hist. N. A. Birds, iii, 1874, pp. 114, 115. 



Here may belong also the following records : F. 

 islandicus, Putnam, Pr. Essex Inst., i, 1856, p. 226, 

 Seekonk Plains, Mass. (same record as quoted by Allen; 

 Pr. Essex Inst, iv, 1864, p. 81, under name of F. candicans^ 

 and in part the same as quoted by Coues, Pr. Essex 

 Inst., V, 1868, p. 254, under name of F. saccr), F. candi- 

 c^wj, Verrill, Pr. Essex Inst., iii, 1862, p. 139; "not un- 

 common " at Norway, Me. F. saccr, Maynard, Nat. 

 Guide, 1870, p. 134, and Pr. Bost. Soc. Nat. Hist., 

 xiv, 1872, p. 382. Hicrofalco gyrfalco islandicus, Brown, 

 Pr. Portland Soc. Nat. Hist., Apr. 1882; Portland, Me. 



DUCK HAWK: PEREGRINE FALCON. 



FaLCO PEREGRINUS TwiStall. 



Clm7-s. Tarsus feathered but a little way above in front, not longer 

 than middle toe. First quill not shorter than third; second 

 longest ; first alone decidedly emarginate on inner web. 

 Nostril with a central tubercle; bill toothed as in all the true 

 Falcons. Length about 18 inches; wing, 13.00-14.00 ; tail, 7.00- 

 8.00. Above, blackish-ash, with more or less evident pale edg- 

 ing of the feathers. Forehead and under parts white with more 

 or less fulvous tinge, and blackish transverse bars; conspicuous 

 black cheek patches. Young with the upper parts browner, the 

 tawny shade below stronger, the under parts striped lengthwise. 



