NORWEGIAN JUR-FALCON. Q27 
can be little doubt that young individuals, which are 
yery difficult to distinguish from Icelanders, occasionally 
yisit Britain, as they do the parallel countries on the 
continent. Last year I obtained an egg that looks like 
a Gyr-Falcon’s, from a nest in a tree, for the first 
time from such a situation.” 
Mr. Wolley remarks that it would be convenient to 
call this bird Falco Gyr-falco Norvegicus, and as I 
quite agree with him, I have adopted the suggestion. 
In captivity it differs a good deal from the white 
and Icelandic birds. It is obstinate, revengeful, and 
sometimes attacks Falcons of any species, or darts upon 
its comrade instead of its game. 
Mr. Gurney observes:—“Of the three Jer-Falcons I 
look upon the first, the white one, as certainly distinct. 
IT thmk F. Islandicus and Gyr-falco are so alike that 
it is practically impossible to distinguish them. The 
average size of specimens killed im Iceland certainly 
appears to be rather larger than the average of those 
Jnlled in Norway, and a difference is said to exist in 
the proportion as well as the size of the breast bone; 
but whether this is really a permanent distinction can 
only be proved by more dissections than have hitherto 
taken place. I have a specimen which was killed a few 
years ago in Scotland, and which I believe was re- 
corded at the time in the “‘Zoologist,” by the person 
who procured it. I cannot say whether it is Islandicus 
or Gyr-falco, but as it is rather a small one, it would 
probably, if the two were distinct, be a Gyr-falco.”’ 
With regard to the specific difference between the 
Gyr-faleo and F. Islandicus M. Schlegel observes :— 
“When young, the Gyr-Falcon agrees in colour in every 
respect with the young of the Iceland bird, and the 
distribution of colours has the same individual varieties 
