26 BRITISH BIRDS. 



It was evidently a breeding bird. Dr. Hartert [Bull. B.O.C., 

 XXV., p. 89) mentions having seen similar specimens in the 

 breeding season on Herm and in Marocco. 



F, C. R. JOUKDAIN. 



MIGRATIOX OF CO:\DIOX SCOTERS AND OTHER 



DUCKS. 



In connection with the appearance of Common Scoters 

 {(Edemia nigra) m Hertfordshire, Buckinghamshire, and 

 Cheshu-e on AprU 10th, 1910 (Vol. III., pp. 414, 415) I may 

 note that on April 13th I witnessed an enormous migratory 

 movement of this species off Dungeness Point, Kent. As 

 soon as it was daylight flock after flock of these birds passed the 

 poiat comiag from the west and flying east. Tliis migration 

 lasted for at least two and a half hours, the flocks passing 

 almost without intermission the whole time, and had for the 

 most part finished by 8.30 a.m. So numerous were the birds 

 at the height of the migration that I counted thu-ty-two flocks 

 (from ten to sixty birds in a flock), passing the point in twenty 

 minutes. Besides Common Scoters I saw five flocks of Brent 

 Geese [Bemicla brenta), five single Divers and several small 

 parties of Terns (Sterna fluviatilis or S. wacn^ra), all steadily 

 going eastwards. It would be interesting to know whether 

 these birds kept on eastwards or whether after passing the 

 Foreland they turned north. 



On April 2nd in two different places in Romney Marsh, 

 Kent, there were masses of Mallard {A7ias boscas), Wigeon 

 (Mareca pe7ielope) and Teal (Nettion crecca),and in one place 

 some Tufted Duck [Fuligula cristata), Pochard {F. ferina), 

 Pintail {Dafila acuta) and many Shovelers {Spatula dypeata) ; 

 some had left in a day or two, and most had gone by the 

 16th. Garganey [Querquedula circia) had arrived by the 10th. 



Claud B. Ticehfrst. 



BLACK TERXS IX OXFORDSHIRE. 



It may be of interest to record that on May 15th, 1910, 

 I watched two Black Terns {Hydrochelidon nigra) hawking 

 over a stretch of the Isis between Oxford and E\TXsliam. 

 A week later they were gone. 



A, Ritchie. 



BLACK-THROATED DIVER IX CARXARVOXSHIRE. 



On April 30th, 1910, I watched for upwards of an hour a 

 Black-throated Diver [Colymbus arcticus) in Llandudno Bay, 

 and the fact that it approached to within a distance of 



