8o THE SCOTTISH NATURALIST 



summer passing in flocks to feeding grounds, but only small numbers 

 have been seen on the rocks or close inshore, and have never bred. 



Little Auk {Mergulus alle). — I have only seen these on one 

 or two occasions during winter. 



Common Guillemot {Uria troile). — These are seen passing 

 to feeding grounds in large flocks all summer, but chiefly in June 

 and July. In 19 13, for the first time during my residence here, one 

 pair bred on the cliffs; and in 1914 at least nine pairs remained all 

 summer, breeding immediately under a colony of Kittiwakes. 



Black Guillemot {Uria grylle). — Breed numerously in the 

 clefts and rents of rock all round the coast, and are a very 

 interesting species. The 9th and 20th February in 1912 and 191 3 

 are the dates of their earliest appearance, and they leave the coast 

 as soon as their young reach the sea. The majority depart in 

 August, the latest in first week of September. 



Puffin {Fratercula ardicd). — Are also seen passing in large flocks 

 during summer, and I have frequently seen them nesting on the 

 rocks here, but they do not breed. Several of their skeletons, 

 and also of the Black Guillemot have been found on the pasture- 

 lands — remains offcasts of Falcons or Great Black-backed Gulls which 

 had been picked up from the sea, or carried from the beach. 



Great Northern Diver {Colymbus glacialis). — Seen now and 

 again in the sandy bays during the winter, but most frequently in 

 April and March. 



Black-throated Diver {Colyt7ibus ardicus). — These are also 

 seen, but not so often as the larger bird. 



Little Grebe {Podiceps minor). — A pair with one chick was 

 on the loch here in August 191 2, and a pair in 19 14. They may be 

 annual visitors, or resident — though not often observed. 



Fulmar {Fulmarus gladalis). — The Fulmar was only rarely seen 

 passing here previous to 191J, when on 19th March several pairs 

 came to the rocks. They evidently intended breeding, but were 

 stoned away. They returned again repeatedly, one pair staying till 

 August. They have bred at Doon Tower cliffs on the east side of 

 the Lewis, about six miles from the I>utt, for the last four years. 

 In June 1913 I saw these breeding birds; and in July 1914, several 

 young chicks on the cliffs. They were said to come from North 

 Rona, but are called here St Kilda Gulls. 



Manx Shearwater {Puffinus angloruni). — One of these was 

 killed at the lantern in August 19 10, and, as they breed in other 

 parts of the Lewis, may often pass unobserved. 



Storm-petrel {Procellaria pelagica). — Have never been seen 

 except as lantern visitors at night, but are got nearly every year, 



