CHOUGH. 581 
great doubt must attach to the example in question; for P. alpinus is not a 
migratory species, and, further, is a bird very likely to be imported into this 
country. It is found in the mountain-ranges of Southern Europe and the 
Himalayas, and may always be distinguished from the British species by 
its short yellow beak. The egg of this bird has been figured (Plate 16) 
for the sake of comparison with that of the British species. I found it 
breeding in the Parnassus, 
