160 ANNALS OF SCOTTISH NATURAL HISTORY 



CURLEW, Numenius arquata. Abundant during autumn, winter, and 

 spring. It feeds a good deal on a small mollusc, which it 

 finds on the machars. The bird roosts mostly on the rocks 

 by the sea-shore. 



WHIMBREL, Numenius phceopus. Passes here in large flocks in May, 

 the migration continuing the whole of the month. Comparatively 

 few come here on the return journey in August. 



SANDWICH TERN, Sterna cantiaca. An occasional visitor on migra- 

 tion. One was shot and identified some years ago. 



COMMON TERN, Sterna ftuviatilis. A numerous breeding species. 



ARCTIC TERN, Sterna macrura. An abundant breeding species, 

 more numerous I think than the Common Tern. 



LITTLE TERN, Sterna niinuta. -There are several colonies of Little 

 Terns on the island. It breeds on the sand, above and close 

 to high-water mark. 



BLACK-HEADED GULL, Larus ridibundus. A few pairs breed on the 

 island, but they are never numerous. 



COMMON GULL, Larus canus. Numerous, and breeding on the flat 

 rocks all over the island. 



HERRING GULL, Larus argentatus. Common, resident, and breeds. 



LESSER BLACK-BACKED GULL, Larus fuscus. Same remarks apply 

 to this species as to the Herring Gull. 



GREAT BLACK-BACKED GULL, Larus marinus. Common enough, 

 but I do not think it breeds, for I have never found its nest 

 on this island. 



GLAUCOUS GULL, Larus glaucus. I have seen a single bird now and 

 again of this species. 



KITTIWAKE GULL, Rissa tridactyla. Numerous, resident, and 

 breeds. It nests on precipitous cliffs which are quite inac- 

 cessible. 



RICHARDSON'S SKUA, Stercorarius crepidatus. A regular summer 

 visitor, arriving about the beginning of June. It has bred on 

 the island, but does not do so every summer. 



RAZORBILL, AIca torda. Resident, and breeding on the cliffs at 

 Kennavara Head. 



COMMON GUILLEMOT, Una troile. Not nearly so numerous as the 

 Razorbill, and breeds along with that species at Kennavara 

 Head. Formerly this species was by far the more numerous of 

 the two. 



