1919-] Birds of the Canary Islands. 127 



Phylloscopus trochilus trochilus *. Willow-Warbler. 



Motacilla trochilus Linn. Syst. Nat. 10th ed. 1758, 

 p. 188 — Type locality : England. 



The Willow- Warbler is a Bird of Passage at somewhat 

 irregular seasons. 



It is first recorded by Cabrera (Catalogo, p.42), who notes 

 that he has killed specimens in spring and in summer. 



Polatzek (Orn. Jahrb, 1909, p. 123) says that it is a 

 regular bird of passage to the Canaries, particularly in the 

 eastern islands where it stays longer in winter. In the 

 winter o£ 1904 he shot specimens in both Lanzarote and 

 Fuerteventura. 



Von Thanner has the following records of this species 

 which he has published in the ^ Ornithologischc Jalir- 

 buch ' :— 



25 February, 1910. A bird shot in Fuerteventura (Orn, Jabrb. 1910, 

 p. 2i^9). 



14 March, 1905. Numerous " trochilus " seen in Fuerteventura (Orn. 

 Jahrb. 1908, p. 214). 

 is ( ^ great many Phylloscopus t. trochilus passing- 



through Fuerteventura between these dates (Orn. 



3 April, 1912. ^ Jalu-b. 1912, p. 226). 

 27 August, 1906. A bird sliot at Vilafior, Tenerife (Orn. Jahrb. 1908, 

 p. 214). 



Unfortunately von Thanner made a mistake in the identi- 

 fication of two of his skins recorded in the Orn. Jahrb. 

 1905, p. 65, where under the heading of Phyllopneuste 

 trochilus he says : 



14 March, 1904. " Birds seen on this date in Fuerteventura, and even 

 later a few remained." 



The two skins which he obtained are now in the Tring 

 Museum, where I have examined them along with Dr. Har- 

 tert, and there is no doubt whatever that they are examples 



* All the records of the Willow-Warbler which have been published 

 refer to the typical form. A closer investigation, and examination ot 

 specimens killed, may show that the Northern Willow-Warbler (P. t. 

 eversmanni), which also apparently winters in Africa, has occurred in the 

 Canary Islands on migration. 



