REPORT ON SCOTTISH ORNITHOLOGY IN 1916 199 



The Iceland Gull, Larus leucopterus. Is noted from our 

 island stations up to 16th March. First seen North Ronaldshay 

 on 15th September, and Whalsay Skerries on 16th October, and 

 thereafter notes come from our Northern Isles up to the end 

 of 1916. 



The Kittiwake, Rissa tridactyla tridactyla. Large flocks are 

 reported on the cliffs at North Unst on 15th March, a few at the 

 Isle of May on 19th, and some at Sule Skerry on 24th March. 

 After this visits to the breeding ledges are reported periodically till 

 they settled down there finally about mid- April. A flock were seen 

 at the Isle of May on 28th September, great numbers were passing 

 near Kingsbarns on 10th October, and a bird of the year was seen 

 there on 19th October. 



The Ivory Gull, Pagophila eburnea. See p. 151. 



The Great Skua, Stercorarius skua skua. Arrived at North 

 Unst on 10th April, and on 17th and r8th July two were seen at 

 Whalsay Skerries. 



The Pomatorrhine Skua, Stercorarius pomarinus. One was 

 found lying dead on the seashore on 5th August, near Galson 

 (O.H.). 



The Arctic Skua, Stercorarius parasiticus. Arrived at North 

 Unst on 28th April, and one was seen at the Monachs on 1st May. 

 Last seen North Ronaldshay on 22nd September, Kingsbarns on 

 10th October, the Bell Rock and the Dornoch Firth on 19th 

 October. 



The Razorbill, Alca torda. Numerous at the Isle of May on 

 10th February, and returns to breeding cliffs are noted from 30th 

 March to 22nd April. 



The Guillemot, Uria troille troille. There were numbers of 

 Guillemots on the cliffs of the Isle of May on 26th, 27th, and 31st 

 January and 10th February, three at the Monachs on 4th March, 

 and returns to breeding cliffs are reported from 22nd April to 10th 

 May, late dates for this bird to take up its breeding quarters. 



The Black Guillemot, Uria gryllegrylle. On 27th February 

 twenty-one Black Guillemots, fifteen in dark and six in light plumage, 

 are reported from Whalsay Skerries, and arrivals took place at the 

 Butt of Lewis on 16th March. First seen off Kingsbarns on 20th 

 October and in the sound off Kyleakin on 23rd November and 8th 

 December. 



