ON ORNITHOLOGY. 415 
tinguish the various birds of prey very well, had been awaiting 
my return at a clearing about half a mile away, and before I 
related my experiences he told me that, shortly before the two 
shots, a Cinereous Vulture and a “Stein” Eagle had followed 
each other high aloft and then, commencing to fight, had 
descended towards my hiding-place. 
I am perfectly sure that the Cinereous Vulture was the 
owner of the nest, but what caused the fight I do not 
know. It seemed, however, to be that the “Stein” Eagle 
was certainly the stronger and more courageous bird, for it 
had forced its way right into the dwelling of its huge 
adversary. 
I have rarely had an opportunity of seeing the Griffon 
Vulture (Vultur fulvus) in the open, and have never managed 
to kill it. On several occasions, however, I observed it in 
various parts of Slavonia, but always when it was soaring at a 
very great height. The districts which I visited were gene- 
rally wooded and had but few rocks, and rocks are what this 
vulture must have before it feels at home. 
Many naturalists even maintain that the Griffon Vulture: 
only builds on rocks ; but this is incorrect, for where they are 
altogether wanting it puts up with big trees. It is, however,. 
quite true that in such wooded districts it is of very rare 
occurrence. In the above-mentioned forests round Cerevit 
we found only one nest of this bird; it was placed on a 
large oak, and the female was killed by Eugen v. Homeyer as 
she was flying up to it. 
That the Griffon Vulture is now carrying out a definite 
migratory movement in far greater numbers than the 
Cinereous Vulture is an undoubted fact. Large flocks of 
this species have already been often observed in Bohemia, 
near Pardubitz for example in the year 1877 ; and when the 
natural-history collections in the schools of small provincial 
