1 92 1.] Bird~Mig ration hy the Marlang Method. 517 



Mortensen (11) has found this species highly migratory, 

 Danish-bred birds reaching southern England, Brittany, and 

 southern Spain. 



SHELD-DUCK {Tadorna tadorna Linn.). 



Of a brood of ducklings marked in Hampshire on 

 16 July, 1912, the following reappeared : — 



Case 447 : 10 Feb. 1913, Saltash, Cornwall. 



Case 448 : ca. 12 Aug. 1913, Biisum, Schleswig-Holstein, 



Gei'many. 

 Case 906 : 18 Aug. 1917, Mouth of the Weser, Germany. 



The eastward wandering in two cases is curious and 

 suggests that of the two Mallards previously referred to in 

 Section VI. : the explanation already put forward might 

 also apply here, although in the absence of other records one 

 cannot be so certain that these are exceptional instances. 



TEAL (Querqnedula crecca Linn.). 



One (Case 446) marked as a duckling in Inverness-shire 

 on 29 May, 1912, was shot in County Waterford, Ireland, on 

 5 February, 1914. The only other record is of no interest. 



Teal marked in Denmark by Mortensen (10), having been 

 caught in decoys on autumn passage, have been recovei'ed in 

 Holland, England, Ireland, and France, and in southern 

 Spain and northern Italy. 



WIGEON {Mareca peneloiie Linn.). 



Of a brood of five ducklings marked in the east of Suther- 

 land, Scotland^ on 19 June, 1909, the following were 

 recorded : — 



Case 4: 3 Sept. 1909, Ulrum, Grouingen, Holland. 

 Case 118 : ca. 2 Jan. 1911, River Trent, Nottinghamshire. 



The species is chiefly known in the British Isles as a 

 winter visitor or bird of passage, and this slight evidence of 

 movement on the part of native birds is of some interest. 



WOOD-PIGEON {Columha palmnhus Linn.). 

 Twelve birds marked as nestlings in various parts of 

 Scotland were subsequently recorded, ten of them from 



