NEOPHRON PERCNOPTERUS. 31 
are hazel. The Spanish Griffon has been separated by Mr. 
Sharpe^ on account of its smaller size and tawny colour. 
The Sociable Vulture, Otogyps auricularis (Daud.), is pro- 
bably to be found in the southern part of Morocco, and is to 
be distinguished by the naked j!>mA: or flesh-coloured neck. 
3. Neophron percnopterus (Linn.). Egyptian Vulture. 
Moorish. Rekhama. Spanish. Monigero, Relijero, Alimo- 
clia, Pernetero, and, away from the Sierras, Quebranthuesos. 
" Appears near Tangier in flocks during migration, some 
remaining to nest in the vicinity, awaiting the return of the 
autumnal migration, to winter probably in the interior of 
Africa. Those which pass over to Europe cross from February 
to April, returning in August and September. They nest on 
rocks in April, generally laying two eggs, sometimes only one. 
These have a rough surface, and vary in shape. Sometimes 
there is an interval of two or three days in the hatching of 
eggs in the same nest. Fifty four eggs have passed through 
my hands. ^^ — Favier. 
Near Gibraltar Neophrons, during their stay, are abundantly 
distributed. Two pair nest annually on '^' the Rock,'' going 
by the name of " Rock-Eagle " among those who would call a 
Buzzard a Bustard, and vice versa. One nest is below O'Hara's 
Tower, the other below the Rock gun on the North Front. 
Many pass northwards at the end of February, the 23rd 
being the earliest date on which I saw one ; but the greater 
number, many hundreds, almost always in pairs, pass during 
March. On the 21st and 24th of that month in 1872, great 
quantities crossed at the same time as flights of Nisaetus 
pennatus, Circaetus gallicus, Buteo vulgaris, Milvus ictinus, 
and Milvus korschun. 
The Neophron usually begins to lay about the 1st of April. 
The nest is often easily accessible from below, and, placed on 
a ledge of some overhung rock, generally at the top of a 
sierra, is composed of a few dead sticks, always lined with 
wool, rags, and rubbish. I found about a pound of tow in 
one nest and the sleeve of an old coat ; it also contains usually 
a lot of bones, and stinks horribly. 
