BIRDS OF THE BRITISH ISLES. 



397 



Bulwer's petrel. 



BULWER'S Petrel (Bulweria columbina, Moquin-Tandon) is 

 a very rare abnormal spring migrant to the British Isles, 

 and is found inhabiting the Northern Circum-tropical seas. 

 The adult has the general colouration of the plumage 

 nearly uniform sooty-black ; greater wing-coverts margined 

 with paler; the tail consists of twelve feathers, and is 

 wedge-shaped ; irides, dark hazel ; bill, black ; legs and 

 toes, deep reddish-brown ; webs, dark brown. Length, 

 about ten inches. 



