1 92 1.] ■ Blrd-Migrat'wn hj the ]\larhh}g Method. 501 



same estate) during their first winter, one in the same district 

 in the summer o£ 1912, and the other two as follows : — 

 Case 367 at Gottriip, Aalborg, northern Denmark, on \% 

 July 1911, and Case 738 at Osterley, Upland, Sweden 

 (lib km, north of Upsala), on 10 August 1913; the 

 former was described as a mother in charge of a large 

 brood of ducklinos. 



Of 31 hand-reared ducklings marked at Dunecht House, 

 Aberdeenshire, in 1911, 13 were recovered in the same 

 district (11 on the same estate) in their first season 

 (9 on 31 August, 2 in November, 1 in December, atul 

 1 in January) . Of 67 hand-reared ducklings marked at 

 the same place in 1912, 38 were recovered in Ihe same 

 district (36 on the same estate), 35 in their first season 

 (31 in September and October, 2 in November, and 2 

 in December), and 3 in their second season (1 in June 

 with a brood of young, ] in October, and 1 in January). 

 Of 11 marked at the same place in 1913 none was 

 recovered. Of hand-reared ducklings marked elsewhere 

 in Aberdeenshire, 3 were recovered in the same district, 

 1 of them in its first season and 2 in their second. 



At Leiidenham House, Lincolnshire, 38 hand-reared duck- 

 lings were marked in 1912, and 19 of these were lecovered 

 on the same estate, 15 in their first winter and 4 in their 

 second. In 1913, 28 were marked there, and 2 of these 

 were recovered at the same place on 4 October of that 

 year. A hand-reared duckling marked in Hampshire was 

 recovered at the place of marking in its first winter. 



Of birds marked as wild ducklings, five marked in 

 Aberdeenshire (two), Inverness-shire, Berwickshire, and Co. 

 Monaghan res[)ectively were recovered at the places of 

 marking in their first seasons ; and one marked in Aber- 

 deenshire was recovered there on the 1st of August of its 

 third year. 



Bearing in mind that most of the birds referred to were 

 hand-reared, the following conclusions may be drawn. With 

 two exceptions all the birds were recovered at or very near 



