THE BIBDS OF BABDSEY ISLAND. 17 



cases there is a nearly perpendicular rock face or turf slope ; this 

 enables the birds to get on the wing readily. I tried to find out if the 

 Shearwater stands on its foot (toes and webs) alone, or on its foot and 

 tarsus, but without coming to a perfectly satisfactory conclusion. But 

 my impression is that when a Shearwater is standing still, on land, it 

 rests on the foot and tarsus ; but when it runs forward a few steps to 

 get on the wing, it rises on to its feet. Birds which I held by the tips 

 of the extended wings moved in this way, but declined to remain still. 

 And two that were sent to me once in an open box (from which they 

 could not rise) were always squatted down, until I liberated them. 



The avifauna of Bardsey is not unlike that of Lambay Island, 

 off the opposite coast of Ireland, but further north (vide Zool. 

 1882, p. 155). Of the forty-four species in Mr. Hart's list, I 

 have seen twenty-seven in Bardsey, and all the others (except the 

 Twite, Hooded Crow, Rock-Dove, Black Guillemot, and perhaps 

 the Ring-Dove) very probably occur. In respect of the last 

 named allowance must be made for the different character of the 

 respective mainlands. The Carrion-Crow is naturally replaced 

 on Lambay by the Hooded Crow, although the latter is stated to 

 have been very rarely seen in that part of Ireland at that date. 

 The Black Guillemot formerly bred on Lambay ; indeed, a few 

 pairs are said to breed still, as well as on Ireland's Eye, and 

 perhaps at Howth and Wicklow Head, still nearer Bardsey 

 (' Birds of Ireland '). Yet we have no record of it breeding on 

 Bardsey, or in any part of Lleyn. 



Of the forty species seen on Bardsey, twenty-seven occur in 

 the Lambay list ; and of the other thirteen, one (the Chough) 

 formerly bred there, and the rest (save the Carrion-Crow, Turtle- 

 Dove, and Stock-Dove) are all common Irish birds. The Turtle- 

 Dove is as rare in Lleyn as in Ireland. Part of the (limited) 

 breeding range of the Stock-Dove in Ireland (Wicklow) lies just 



opposite Bardsey. 



(To be continued.) 



Zool. 4th ser. vol. VI., January, 1902. 



