508 Dr. A. L. Thomson : Results of a Study of [Ibis, 
The following fuller particulars of 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 Eddystone 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 caught 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 reappeared 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. 
