104 BRITISH BIRDS. [vol. xm. 



The British Song-Thrush {Turdus philomehis clarkei). 



A regular double-passage migrant in large numbers. 



Spring passage, second week in February to the end of 

 March, and occasionally to the second week in April. Light 

 records on single nights in January (occasionally on three or 

 four successive nights) in some years are probably weather 

 movements, either downward in severe winters or upward in 

 unusually mild ones. 



Autumn passage, end of August to the third week in Decem- 

 ber, once as early as July loth 'nth ; in largest numbers 

 between mid-September and mid-November. 



Evidently not a constant summer resident, as none was 

 seen by Mr. Aplin or by Mr. Coward. 



In June 1913 a single pair with a brood of full-grown young 

 were found in one of the tiny osier beds, which was evidently 

 their home, as they only left it to feed on an adjoining meadow. 

 In the course of six days they had only travelled as far as 

 one of the other osier beds near by. Between September 

 3rd and i6th a dribbling migration was in progress, the 

 numbers being quite small, and except on the 4th a few were 

 seen each day up to the 22nd. 



All the birds hitherto seen have been of the British race. 



The Redwing [Turdus musicus). 



A regular double -passage migrant in large numbers. 



Spring passage, mid-February to the third week in April. 

 January movements recorded in some years as with Song- 

 Thrush. Heaviest numbers in the last half of February and 

 in March. 



Autumn passage, from the beginning of October to the first 

 week in December, occasionally to the third week. Heaviest 

 numbers between the middle of October and the second 

 week in November. 



The Ring Ouzel {Turdus t. torquatus). 



Probably a regular double-passage migrant in small num- 

 bers. Twice recorded from the light in spring, small numbers 

 on April nth '12th, 1910, and I2th/i3th, 1912. 



Recorded in autumn between the third week in August 

 and the fourth week in October in 1908, 1910, 191 1 and 1913, 

 always in small numbers. In September 1913 two immature 

 birds were seen on the 3rd and an adult on the 5th. Each 

 of them stayed for one day only. 



The Blackbird {Turdus m. merula). 



A regular double-passage migrant in large numbers. 



Spring passage, second week in February to the first week 

 in April, latest date recorded April 20th. Heaviest numbers 



