508 Dr. A. L. Thomson : Besults of a Study of [Ibis, 



The following fuller particulars o£ certain cases included 

 above may be added : — 



Case 102 : Marked as a nestling in Aberdeenshire on 4.6.10 ; 



shot 70 miles north of Lisbon on 6.11.10. 

 Case 613 : Marked as a nestling in Aberdeenshire on 10.6.11 ; 



found dead at Arundel, west Sussex, end of January 1912, 

 Case 596 : Marked as a nestling in Aberdeenshire on 19.5.13 ; 



recovered at the Eddj'stone Lighthouse, in company with 

 other birds, on the night 27/28.2.14. 

 Case 922 : Marked as a nestling on the Isle of May, Fifeshire, on 

 20.5.11 and found dead at the same place in March 1920 — 

 nearly nine years later. 



Of Song-Thrushes marked as nestlings at Beaulieu, 

 Hampshire, in April 1912, one (Case 617) was canght at 

 Bridgewater, Somerset, on 2. 11. 12, and one (Case 597) 

 was recovered at St. Catherine's Lighthouse, Isle of 

 Wight, on the night 9/10. 2. 13. Three birds marked as 

 nestlings at Dawlish, Devon, were recovered at the same 

 place in winter, two in their first year and one in its 

 second. 



Thirteen Song-Thrushes marked in Great Britain other- 

 wise than as nestlings were recovered, all at the places of 

 marking. Two of these had been marked in summer and 

 reappeared respectively in the summer of the fourth year 

 and in the winter of the first. Of the remainder, all 

 marked in winter, two i-eappeared in summer, four in the 

 winter of marking, four in subsequent winters, and one was 

 recorded six times in all during the following summer and 

 winter. 



The data given above suffice to show that some of the 

 British native Song-Thrushes (belonging to the race Turdus 

 musicus clarkii Hartert) are resident, while others are 

 summer visitors. The number of positive records showing 

 migration is not large, but the scarcity of winter records 

 from the area of marking, in the case of birds marked in 

 summer, may perhaps be taken as evidence of a negative 

 kind in support of the same conclusion. 



