BIRDS OF NEW YORK 



163 



Oceanodroma leucorhoa (Vicillot) 



Lcacli Petrel 



Procellaria leucorhoa Vieillot. Nouv. Diet. d'Hist. Nat. 1817. 25:425 

 Thalassidroma leach i DeKay. Zool. N. Y. 1844. pt 2, p. 291, fig. 295 

 Oceanodroma leucorhoa A. O. U. Check List. Ed. 2. 1895. No. 106 



oceano'droma, Gr. flKcaTOs, ocean, and Spojuos, running; Iciico'rJioa, Gr. 

 AtnKo?, white and o'/jpos, rump 



Description. Sooty blackish, browner below; wing coverts grayish 

 brown; upper tail coverts white, the shorter ones mixed with brownish; 

 bill and feet black; iris brown; tail forked. 



Length 7.5-8.9 inches; extent 17-18; wing 6-6.5; tail 3.5-4, forked 

 .JS-.g] tarsus .9-1; middle toe and claw i; Ijill .67. 



The Leach or common Forked-tail petrel inhabits the seas of the 

 holarctic region in general, breeding from the Hebrides and the coast of 

 Maine northward, and migrating southward in winter as far as Virginia and 



Leach petreL Oceanodroma leucorhoa (VieiUot). From Audubon. Birds of America. ^ nat. size 



