BUDYTES FLAVUS. 109 
visitor near Tangier, appearing in September and October, 
departing in February and March. 
In Andalucia they are most abundant on passage and during 
the winter months, but many pairs nest along the mountain- 
streams of the sierras — three or four pair particularly on the 
river which runs down the Garganta del Aguila, the valley in 
which is the " waterfall " of Algeciraz. They build usually 
in holes of the brickwork of the water-mills, sometimes close 
to the wheel, A pair also regularly nest at the mill in the 
Cork- wood ; and Mr. Stark, when with me on the 9th of April, 
found a nest built in a hole of a large rock overhanging the 
Guadalmalcil, a mountain-torrent between Tarifa and Alge- 
ciraz. This nest was placed out of reach of either man or 
beast ; the hen bird was visible from the opposite side, and 
apparently sitting hard. On the 19th of April, the nest at 
the mill in the (^ork-wood contained one e^^, while another 
nest I found on the 24th of May had four fresh eggs in it. 
This tends to show that they breed more than once in the 
season. The nest is constructed of grass and small roots lined 
with hair. 
Some only of the males had the black throat on the 8th of 
March ; but all had assumed it by the 1st of April. The 
females do not always exhibit this mark, some not having it 
at all ; and in none is it so well defined as in the males. 
It is the largest of the Wagtails found in these parts, being 
about 7| inches in length, with the tail-feathers much longer 
in proportion to the body than in the other species. 
134. BuDYTES FLAVUS, vcl ciNEREOcAPiLLus, Savi. The 
Grey-headed Yellow Wagtail. 
This species is found on both sides of the Straits in great 
abundance ; the earliest that I saw it was on the 20th and 24th 
of February (in difi'erent years), many appearing on the 25th. 
From that time till the 20th of April they continued to pass ; 
and on that date I saw great numbers at Gibraltar, resting 
on the " flats " at Europa after their flight across the sea. 
They leave in August and September. They keep to marshes, 
nesting in grass and herbage at the edge of water, sometimes 
