260 STUDIES IN BIRD-MIGRATION 



appeared on 12 th September. These were followed by 

 a few others on the 13th and 17th. 



Lapwing, Vanellus vanellus. — Occurs regularly on 

 passage in both spring and autumn. We had only one 

 visit of Lapwings during our stay. On 1 3th September 

 three appeared in the early morning, and remained a few 

 hours on the island. 



Turnstone, Strepsilas interpres. — Occurs occasion- 

 ally during the autumn passage and in winter ; but the 

 island, with its precipitous sides, affords little attraction 

 for this bird, and it does not remain long. We observed 

 a single bird on 7th September ; and two appeared on 

 the loth and remained for several days, during which 

 one fell a victim to the Peregrine Falcon. These birds, 

 like the Ringed Plovers, frequented the bare patches 

 amid the sea-pink on the top of the island. 



Oyster-catcher, Hcematopus ostralegus. — A common 

 summer visitor to the islands. Several pairs nest on 

 Eilean Mor, and leave along with their young in August. 

 We saw only a single example during our visit — namely, 

 on 14th September. 



Common Snipe, Gallinago gallinago. — A frequent 

 visitor, though usually appearing in small numbers, 

 during the spring and autumn migratory movements. 

 A few were observed during our visit, the first of which 

 appeared on 14th September. It also occurs at intervals 

 in October and November. 



Jack Snipe, Gallinago gallinula. — The chief migra- 

 tory movement witnessed during our visit was a very 

 remarkable one on the part of this species. The first 

 immigrant was observed by us on the evening of 14th 

 September, and this was followed on the night of the 

 16th or the early hours of the 17th by a great rush. 



