PROCELLARIIDA, 729 
LEACH’S FORK-TAILED PETREL. 
OcEANODROMA LEUCORRHOA (Vieillot). 
This species was first made known as a British bird by Bullock, 
who obtained it at St. Kilda in 1818. Subsequently it has often 
been noticed within our waters, and it is now met with almost 
annually on the east coast of England, as well as in Wales. It also 
occurs inland, especially after northerly and westerly autumnal gales, 
from which fact Mr. Cordeaux infers that birds are driven right 
across the country. Off Cornwall it is quite as common in some 
winters as the Storm-Petrel, and it may be said to have been taken 
in almost every maritime county of Great Britain; while unusual 
numbers were noticed on the Scottish coast in the autumn of 1891 
(W. Evans). In 1847 it was found breeding in the St. Kilda 
group, and later investigations have shown that further colonies 
exist on North Rona and several islands in the Outer Hebrides ; 
while ere long the species will probably be found incubating on 
some of the Inner islands. In Ireland it has frequently occurred, 
notably in September and October of 1891; and in 1886 its 
egg was obtained by Mr. R. J. Ussher from Tearaght, one of the 
Blasquets, off co. Kerry, the most western land (with the exception 
of Iceland) belonging to Europe, and birds were subsequently 
procured there as well as eggs. 
Leach’s Petrel has wandered to the coast of Norway; but it has 
only been met with on three occasions and at long intervals on 
