50 THE ZOOLOGIST. 



but I could not see any late young ones, nor indeed was there 

 a young bird of any age in sight on the wing or otherwise, and, 

 although of course a young one or so might have been hidden 

 in the rocks, it was quite certain that practically all the young 

 were gone. There is a part of the low coast of Merioneth across 

 the bay where all the early summer at all events numbers of 

 immature (and some adult) Herring-Gulls are always to be 

 found, and as none are bred on that coast it is reasonable to 

 suppose that the young birds bred in Lleyn resort at once, as 

 soon as they are strong on the wing, to the sands and adjacent 

 marshes of Merioneth, and there pass their earlier years. I have 

 previously remarked on the comparative scarcity of immature 

 Herring-Gulls in Lleyn. I saw a very few brown young on the 

 wing about the deep cliff- enclosed inlet called Ogof Lwyd, where 

 there is a stack a little way out, on which, however, I did not 

 think any birds bred. About a score of Kittiwakes (their greenish 

 beaks noticeable) sat on steps of the steep black cliff by the 

 small deep cave at the south-east corner of St. Tudwal's, and 

 looked at a little distance just as if they were breeding, but they 

 only come after Mackerel "seel." As they flew up they broke 

 out into their chorus of cries, which I could hear occasionally 

 from the mainland. Their appearance there probably gave rise 

 to the erroneous idea that they bred on St. Tudwal's. There 

 were, of course, many about Pen Cilan, where they breed in num- 

 bers. The Great Black-backed Gulls had bred in one old haunt, 

 and when near them one morning the deep " ag-eag-cag " drew 

 attention to a grand old bird circling overhead. Black-headed 

 Gulls were very numerous — both adult and young — in the green 

 marshes chiefly, and in Pwllheli Harbour, though there were 

 some on the shores at various places, where they were very noisy 

 at night. Most of the adults had already lost, or almost lost, 

 the dark hood. 



(To be continued.) 



