A. L. THOMSON: MARKING BIRDS. 365 



of birds which were liberated — along with nearly a 

 hundred others not heard of again — at Rossitten on the 

 same day, October 4th, 1906. 



Date and Place of Recapture. 



Feb., 1907. Friedland, Mecklenburg-StreUtz, 



9th April, 1907. Agilla, East Prussia. 



12th April, 1907. Lalendorf, Mecklenburg-Schwerin. 



14th May, 1907. Wainoden, Courland. 



9th June, 1907. Rossitten. 



12th Oct., 1907. Pernau, Livonia. 



7th Dec, 1907. Crefeld, Rheinland. 



There are some interesting records of birds marked 

 about the same time and again recorded about the same 

 time from the same place : — 



Marked at Rossitten. Recorded at Agilla, East Prussia. 



4th Oct., 1906. 9th April, 1907. 



8th Oct., 1906. 14th April, 1907. 



Recorded at Sarkau, Kurische Nehrung. 



9th Oct., 1904. 12th Oct., 1905. 



20th Oct., 1904. 16th Oct., 1905. 



The second couple of these records also shows that the 

 birds passed along the Nehrung at almost the same time 

 in the autumn of 1905 as in the previous season. 



Three records which bear upon the time taken upon 

 migration, give rather different results : — 

 Marked at Rossitten. Date and Place of Recapture. 



28th March, 1904. 31st March, 1904, Pillkoppen, Kur. Neh. 



16th April, 1904. 17th April, 1904 (morning), Pillkoppen 



(6.30 p.m.) (ca. six miles north-easterly from 



Rossitten.) 



18th April, 1904. 26th April, 1904, Peterhof , St. Petersb. 



The fact that it was later in the season may account 

 for the much greater distance in proportion to the time, 

 in the last case than in the first. 



