4. OCEANODROMA LEUCORRHOA (Vieill). 



(LEACH'S PETREL.) 

 (Plate 4.) 



Procellaria pelagica (nee Linn.), Pall., Zoogr. Rosso-Asiat., II., p. 316 (1811). Cf. 



Stejneger, Orn. Expl., Comm. Isl. and Kamtsch., p. 97 (1885). 

 Procellaria leucorhoa, Vieill., N. Diet. d'Hist. Nat., XXV., p. 422 (1817). 

 Procellaria leachi, Temm., Man. d'Orn., II., p. 812 (1820) ; Sharpe, Hist. Coll. Brit. 



Mus., II., p. 222 (1906). 

 Procellaria bullocki, Fleming, Brit. An., p. 136 (1828). 

 Thalassidroma leachi, Audub., Orn. Biogr., III., p. 434 (1835). 

 Fork-tailed Petrel, Yarrell, Brit. Birds, III., p. 520 (1843). 

 Thalassidroma scapulata, Kittl., Denkw., II., p. 191 (1858). 

 Cymochorea leucorrhoa, Coues, Pr. Philad. Acad., 1864, p. 75. 

 Oceanodroma leucorrhoa, Stejneger, Orn. Expl., Comm. Isl. and Kamtsch., p. 97 



(1885) ; Salvin, Cat. Birds Brit. Mus., XXV., p. 348 (1896). 

 Hydrdbates leucorrhoa, Lons, J.f.O., 1906, p. 221. 



Fuliginoso-niger, schistaceo adumbratus ; tectricibus majoribus pallidioribus, 

 cinerascenti-brunneis ; supracaudalibus albis, vix nigro terminatis ; cauda valde 

 furcata. 



Juv. adultis similis, sed tectricibus alarum majoribus et secundariis extus grisescenti- 

 albis distinguendus. 



Leach's Peteel, often called the " Fork-tailed Petrel," constantly occurs on the 

 British coasts, and, like Procellaria pelagica, is not infrequently blown far inland by 

 heavy gales during spring and autumn. 



This species breeds on St. Kilda and several of the Outer Hebrides, as well as 

 the Blaskets and other rocks on the west coast of Ireland. Although found at various 

 seasons throughout the North Atlantic, and visiting Norway and Iceland, it is not 

 known to breed in the last-named localities. Westward its range extends from 

 Greenland and Labrador, south to the coast of Virginia, and it breeds from the coast 

 of Maine northward. 



8 





