SYLVIA UNDATA. 55 



were formed of grass with a few bits of cotton-thread, lined with 

 hair ; but they also nest at' some height on boughs of trees. The 

 eggs vary in number from three to five. The male assists in 

 incubation. 



This bird is, like the Blackcap and Garden-Warbler, very fond 

 of figs and grapes and all kinds of fruit. The feathers at the 

 base of the bill and the throat are often much coloured with the 

 pollen of cactus, aloe, and other flowers, also with the seed of the 

 " pepper- trees." 



Tail longer than wing : claws and throat pure white ; eyelids brick-red. 

 Male. General colour above slaty grey ; nape and head black ; below 

 greyish white. 



Female. Above brownish ; head nearly black. Length 4^ inches. 



32. Sylvia undata (BodJaert). The Dartford or Furze 

 Warbler. 



Spanish. Colorin, Caganchina. 



" Is resident but not abundant near Tangier. Some migrate 

 to Europe in March, to return in August. It is solitary 

 in habits. They make a clumsy nest of grass and roots, 

 lined with very fine coils of palmetto-fibre, laying in April." 

 Famer. 



The Dartford Warbler is resident and not uncommon in all 

 the scrub-covered hills on the coast near Gibraltar, particularly 

 about San Roque, but is most abundant on the sides of the 

 sierras, nesting in the heather about the 8th of April, on which 

 date Mr. Stark found a nest near Algeciraz with three eggs. 

 There is no doubt they nest at Gibraltar, as they occasionally 

 remain there through the summer. 



Upper parts blackish brown ; throat, breast, and sides cliestnut-brown ; 

 feathers of chin and throat tipped with white ; tail long and graduated, 

 half the length of the bird ; eyelids arid iris red in adults, yellow in young. 

 Length 5 inches. 



