280 THE BIRDS OF HELIGOLAND 



It should further be mentioned that Claus Aeuckens, on the 

 20th of April 1873, saw a ' black-headed Wai-bler, in which neck and 

 breast were of the same dark coloration as the back.' What 

 species this may have been it is impossible to say. 



103. — Wood Warbler [Waldlaubvogel]. 



SYLVIA SIBILATRIX, Bechstein.i 

 Heligolandisli : Giihl Fliegenbitter= Tellow Wren. 



Sylvia sibilatrix. Naumann, iii. 556. 



Wood Wren. Dresser, ii. 479. 



Bee-fin siffleur. Temminck, Manuel, i. 223, iii. 149. 



This bird occupies a prominent position among the Warblers, a 

 group of song-birds the members of which are distinguished by 

 their retired behaviour, and the modest, yet at the same time by no 

 means unpleasing, coloration of their plumage. 



It is one of the most charming of our tiny songsters, chiefly 

 by reason of the sharp contrast between the coloration of its upper 

 and lower parts. The former portions are of a dark greyish yellow, 

 while the large eye-streak, the upper breast, and the sides of the 

 breast are of a pure and soft lemon-yellow colour. 



It visits Heligoland only in very isolated instances, such 

 few individuals as are met with being seen for the most part 

 on warm May days. During its autumn migration — from the 

 middle of July to the middle of August — the bird is much rarer. 



This bird is a rare breeding species in Spain and Portugal ; its 

 nesting stations extend more numerously from France and England 

 through central and southern Europe, to the Ural ; in the north, 

 its breeding range extends to Denmark and lower Sweden. 



104. — Bonelli's Warbler [Bonelli's Laubvogel]. 



SYLVIA BONELLI, Vieillot.^ 



Heligolanclisb : Grii-hoaded Fliegenbitter = Grc2/-/tcarfed Wren. 

 Sylvia montana. Naumann, xiii. 417. 

 Bonelli's Warbler. Dresser, ii. 503. 

 Bec-fi,n Natterer. Temminck, Manuel, i. 227, iii. 154. 



Up to the present I have only twice obtained this southern 

 species in Heligoland ; in the first instance, an only moderately 

 handsome male, on the 8th October 1861, and subsequently, on the 

 9th of October 1874, an extremely beautiful male in perfectly fresh 



' Phylloscopus sibilatrix CQaahst.). ^ Pkylloscopu^ boncUii (YiciW.). 



