PHYLLOSCOBUS- RUFUS. 63 



42. Phylloscopus sibilatrix (Bechstein). The Wood- Warbler. 

 This species is not mentioned by Favier as occurring near 



Tangier, where, however, they are found, though not commonly. 

 On the Spanish side of the Straits it is the scarcest of the four 

 species of Phylloscopus, and was first seen on the 22nd of April. 

 I killed one in my garden at Gibraltar, and some remain during 

 the nesting-season in the Cork-wood, where Verner found a nest 

 on the 25th of June ; but we did not observe them in winter, and 

 were unable to notice the date of their departure south. 



Nest domed, but not lined with feathers, like those of 

 P. rufus and P. trochilus, and is always placed on the ground. 



The bird is easily distinguished by the streak of bright yellow 

 over the eye and the white colour of the underparts, and is the 

 largest species of the genus found near Gibraltar. 



Distinct light streak from base of bill over eye to crown ; white belly, 

 contrasting with yellow breast and throat. Length 5j inches. 



43. Phylloscopus bonellii (Vieillot): Bonelli's Willow- 



Warbler. 



" Found during migration near Tangier, in company with 

 P. rufus and P. trochilus,~but is not so numerous. They return 

 in September." Favier. 



This species, about the size of the Chiffchaff, is found in 

 plenty near Gibraltar, nesting in the fern in the Cork-wood ; the 

 earliest I noticed arriving was on the 1st of April. Verner, on 

 2nd May, 1877, found a nest in a genista-bush about three feet 

 from the ground. 



They are not found in winter. 



Head and back olive-brown, with green tinge; rump yellow; breast and 

 belly white ; chin and throat tinged with yellow ; eye-streak greyish white 

 Length 4| inches. 



44. Phylloscopus rufus (Bechstein). The Chiffchaff, 



Spanish. Mosquilla. 



According to Favier this bird is nearly as common as the 



