282 STUDIES IN BIRD-MIGRATION 



occurred in autumn from 7th August to 12th October, 

 and in spring from 15th May to 5th June. 



On 9th September 1908, a male of the small Contin- 

 ental race, the Pelidna schinzii of Brehm, was obtained 

 and forwarded for identification. 



Purple Sandpiper, Tringa striata. — A winter visitor 

 to the group. It has been known to arrive as early as 

 28th August, and to remain as late as 28th May. 



Knot, Tringa canutus. — One killed at the lantern on 

 1 8th November 1902, and sent for determination, is the 

 only known instance of a visit of the Knot to the 

 islands. 



Sanderling, Calidris arenaria. — There are records 

 of the visits of single birds on two occasions — 2hd 

 June 1 90 1 and 5th September 1905, when the bird was 

 sent for identification. 



Redshank, Totanus calidris, — The islands being 

 devoid of marshy places, afford no attractions for this 

 familiar wader, and hence the records of its visits are few. 



Single birds are known to have appeared twice in 

 spring, in April and May, and on three occasions in 

 autumn, in August and September. 



Curlew, Numenius arquata. — A regular visitor to 

 the islands in small numbers during spring and autumn, 

 and in cold periods in winter. 



The spring passages date from early April to 20th 

 May ; and the autumn movements from 4th August to 

 1 8th November. 



Whimbrel, Numenius phaopus. — The fact of its 

 having bred has already been alluded to (p. 262). A few 

 visit Eilean Mor, off and on, all through the summer, 

 and the bird doubtless nests on some of the adjacent 

 islands. As a bird of passage, it appears in flocks 



