Teal (Anas crecca L.) in winter. 
By 
H. Chr. C. Mortensen, Viborg, Danmark. 
In ”Dansk ornithologisk Forenings Tidsskrift", 1907 p. 144— 
155 (the article ”Ringfugle" (”ringed birds")) I have given an account 
of an experiment, which I have started in 1899 to get information 
about the migration of some birds of passage, to learn how old 
they grow etc. The experiment is carried out in the following 
manner: young ones from the nests or fullgrown birds recently 
trapped are provided with a ring with my address on one foot. 
In 1907 the Carlsberg Fund has granted me an assistance to this 
experiment; I beg here to offer my best thanks for it! By this aid I 
was enabled in Oct. 1907 to carry out what I had for a long time 
wished to do, viz. to purchase and mark a lot af teal from the 
decoys of the island of Fanø, to the number af 102. 
Besides my address and a numero I had stamped some letter 
on åa great number of the rings; this letter is stated to me with 
the further description of the ring, or an impression of the ring, 
or the ring itself is sent to me. I beg the gentlemen, who have 
had the trouble to correspond with me on that account to receive 
my kindest regards. 
In ”Gads danske Magasin" 1909 (March) a little paper, 
”Krikænderne fra Fanø", will be published; here Danish readers 
will find further particulars of the marking of the teal. 
1. Ringed teal, killed abroad. 
The list of the killed teal, which are all marked in the island 
of Fanø (North lat. 55?20' and East long. 8730" (Gr.)) on Oct. 14th 
and 15th, 1907, follows in chronological order: 
