191 
1921 .] Birds of Macedonia . 
cranium had been broken open and the brain-cavity com¬ 
pletely cleared. After this a large hole had been made in 
the region of the clavicles, and finally the Crows had devoted 
themselves to the large and fleshy pectoral muscles. On 
7 April I found three pairs breeding at Aracli. One nest 
had certainly been built in the same spring. The nests were 
about fourteen feet from the ground, in the forks of slender 
oak-trees, and two of them were quite accessible to a fairly 
active man. The new nest, to which I paid particular 
attention, appeared to be finished by 12 April. During the time 
that building-operations were taking place, the birds roosted 
at night in a tall fruit-tree (in full blossom), about two 
hundred yards away from the nest. On 18 April there was 
one egg in the nest. Both parents were very demonstrative 
when I was getting up the tree, flying round and cawing 
loudly, but later they showed great cunning in not loitering 
in the vicinity of the nest when I was about. The hen bird 
always slipped away at the first sign of danger. The nest 
itself was very conspicuous, composed of twigs, and neatly 
lined with horse-hair and a few feathers. 
Corvus corone. Carrion-Crow. 
I found a dead bird in December, but could not be sure of 
further occurrences. 
Corvus frugilegus. Rook. 
Large flocks about the plain during the winter of 1916-17. 
Especially numerous in December, 1916. On 19 March, 
1916, a steady stream of Rooks was seen flying across the 
plain in a westerly direction at mid-day. Some of them 
(I am sure very weary birds) stopped for a rest in a clump 
of trees, and resumed their journey at dusk. The majority 
of the birds left their winter quarters at the end of February 
or beginning of March. The general direction of the 
movement seemed to be towards the N.*and N.W., in which 
case it may be assumed that the flocks seen on 19 March 
were birds from a region to the S.E. of my area, following 
a line similar to that taken by the Macedonian Rooks. As 
