LETTERS 



MARKING BIRDS. 



To the Editors of British Birds. 



Sirs.— Some of the readers of British Birds may have 

 seen in the "Field" of 11th January a note relating to the 

 capture of a marked Teal in co. Kerry, Ireland. The bird 

 had an aluminium plate round its leg with the name and 

 address and a register number of the gentleman Avho 

 marked it. As I have been for some time in communication 

 with this gentleman (Herr Chr. Mortensen, of Viborg, 

 Denmark) I thought a note of his work might be of interest. 



Herr INIortensen for some years past has been catching 

 various species of birds, and after marking them with an 

 aluminium plate he has given them their liberty again, hoping 

 in this way to trace the movements of these birds. Amongst 

 the species thus marked were Starlings, Kites, White Storks, 

 Goshawks, Common Buzzards, and Teal, and the results to 

 date of these experiments were published in an interesting 

 paper in the " I)ansk Ornithologisk Forenings Tidsskrift," 

 Part IV., 1907. 



This Teal, I believe, A^as one of 100-200 marked during last 

 autumn, and had been taken in the duck decoys there : it 

 therefore had travelled about 850 miles W.S.W. 



A Starling liberated on September 15th, 1904, was taken 

 near Edinburgh, about 450 miles W.S.W. , early in March, 

 1906. Should anyone come across any of Herr Mortensen's 

 ringed birds at any time, it is hoped that they will send the 

 ring, foot, and data of capture either to him direct or to me. 



Claud B. Ticehurst. 

 Guy's Hospital, S.E. 



[Mr. J. A. Harvie-Brown has alsa announced (Ann. Scot. 

 Nat. Hist., 1907, p. 114) that Mr. R. Tomlinson, of Musselburgh, 

 had marked with a metal ring on the left foot a number of 

 Starhngs. Each ring was marked with a number, and the 

 birds — 115 in all — were liberated during December, 1906, 

 and January and February, 1907. — Eds.] 



"THE VERTEBRATE FAUNA OF NORTH WALES." 



To the Editors of British Birds. 



Sirs, — Your review of this book brought to light a most 

 unfortunate misprint on p. 222. The offending paragraph 



