Descriptive List of the Common Birds 
197. Larus brunneicephalus: ‘The Brown- 
headed Gull. (F. 1491), (J. 980), (+IV.) 
This bird is very like the last at all seasons, 
so that it is scarcely possible to distinguish them 
on the wing. 
198. Larus affinis: The Dark-backed Her- 
ring-Gull. (F. 1494), (J. 978), (V-) 
This bird is distinguished from Nos. 196 and 
197 by the fact that its wings and shoulders are 
slate-grey instead of pale grey, and its legs are 
. yellow. It is a much larger bird than the 
above two species. 
It is said to be very common at Karachi. 
It is found on other parts of the West Coast, 
but apparently not on the East Coast. 
199. Larus cachinans: 'The Yellow-legged 
Herring-Gull. (F. 1495), (V.) 
This is very like No. 198, except that its 
shoulders are of a lighter shade of grey. It has 
yellow legs. 
This gull is often seen on the rivers and 
large jhils of Northern India in winter. 
The Terns, 200-205 
These beautiful birds have been aptly 
termed the swallows of the sea, for like swal- 
211 
