SULE SKERRY AND ITS BIRD-MSITORS 291 



Plectrophenax nivalis, Snozv - Btcntmo: — Is a 

 common bird of double passage, and a winter resident in 

 small numbers. The spring passage commences at 

 mid-March, and lasts until 2nd June. The chief move- 

 ments are chronicled for the last week of March. The 

 autumn visits date from nth September to 14th 

 November, large flocks appearing in October and early 

 November. 



Alauda arvensis, Skylark. — Visits the islands in 

 spring, in some seasons in fair numbers, from 2nd 

 March to 8th April. Strange to say, there are no 

 records whatever of its occurrence in autumn ; but the 

 bird has several times appeared in January. Mr 

 Tomison says that it is rarely absent in spring and 

 summer, but does not nest. 



MoTACiLLA LUGUBRis, Pted Wagtail. — This species 

 has been much confused in the records with the White 

 Wagtail, and I am only able to say that there is a single 

 undoubted occurrence of the pied species at Sule Skerry — 

 namely, one on 30th August 1906. 



MoTACiLLA ALBA, White Wagtail. — A regular visitor 

 on both the spring and autumn passages. Its appear- 

 ances date from 28th April to 8th May in spring; and 

 between 23rd August and 24th September in autumn. 

 I saw several on the island on 22nd September 1904. 

 It is not recorded as being numerous. 



Anthus pratensis, Meadow - Pipit. — Occurs on 

 passage in April, August, and September. The records 

 are, however, not numerous, and refer to visits of small 

 parties. I saw several on the island on 22nd September 

 1904. 



Anthus obscurus, Rock-Pipit. — Resident all the 

 year round, but not numerous. They must, says Mr 



