VOL. viii] RINGING BLACK-HEADED GULLS. 215 



at the same place on the same day. Two journeyed 

 inland into Cambridgeshire, five and five and a half 

 months after marking, these also being 1912 birds. 

 Suffolk furnishes one return, one and a half years after 

 marking, and Essex also one, three months after being 

 marked. Kent shows two returns at seven and five 

 months later, and Sussex one, a three months' old bird. 



From the Island of Heligoland comes a return in the 

 breeding-season thirteen months later. From Ulrum, 

 in the Province of Groningen, Holland, a bird was 

 captured two years and eight months after being marked 

 on the Cumberland coast. 



The returns of Black-headed Gulls marked at other 

 colonies are in no case sufficiently large to warrant our 

 basing any conclusion upon them. It may be said, how- 

 ever, that so far as they go these returns appear to bear 

 out the facts proved by the returns from Ravenglass. 

 The few recoveries of birds ringed on the east side of 

 Great Britain would also seem to show that a certain 

 proportion of these birds travel to our west coasts just 

 as some of those bred on the west side travel to the east 

 coast. 



The details of the recoveries of birds ringed at other 

 guUeries are as below. 



(2) Loch Durisdeer, Dumfriesshire, N.B. — ^Three 

 recoveries. One went south-east to Darlington (eight 

 months), one north-east to Perth (one month), and one 

 north to Paisley (one month). 



(3) Penpont, Dumfriesshire, N.B. — Six recoveries. 

 All these occurred in the parent county or the neighbour- 

 ing counties of Northumberland, Cumberland, Lanark 

 and Kirkcudbright within eight months, four of them 

 within six weeks of marking. 



(4) Denton Fell, Cumberland. — Seventeen re- 

 coveries. Three occurred in Annan, Dumfriesshire, two 

 years ten months, two years seven months, and thirteen 

 months afterwards. Two on the Humber, Yorks.-Lincs. 



