VOL. xm.] THE BIRDS OF liARDSEY ISLAND. 183 



Leach's Fork-tailed Petrel {Oceanodroma leucorhoa). 



Once recorded from the light, December 6th 7th, 1913. 

 The Great Shearwater {Puffinus gravis). 



A large Shearwater, dark brown above and brownish-white 

 below, believed to be of this species, was seen off the southern 

 point on September 12th, 1913. 



The Manx Shearwater {Puffinus p. puffmus). 



^ By the fairly constant light records in early spring, this 

 bird would appear to arrive in the neighbourhood of the 

 island in the last two weeks of March. It comes to the lantern 

 after that now and then throughout April and May, when the 

 weather conditions are such as to render the light attractive. 



NESTING HOLE OF MANX SHEARWATER [EGG HAS BEEN MOVED 

 TO ENTRANCeI. 



It is also recorded occasionally between mid- July and the 

 second week in September. 



Mr. Aplin has already given a very full account of the 

 breeding colony on the northern slope of the mountain and 

 I can add but little of importance. Judging by tne " signs " at 

 the entrances to the nesting holes I should put the population 

 in 1913 at thirty to forty pairs. By far the greater number 

 were nesting in natural holes beneath rocks, and only one 

 here and there was in a rabbit hole, and nearly all were quite 



