25 JANUARY 1930, Page 15

RINGED MIGRANTS.

Several letters have reached me, asking the same question. " What is to be done when a bird is found marked with a numbered ring ? Perhaps owing to sudden death from the gales, perhaps owing to oddities of migration due to the same cause an unusual number of ringed birds have been found. Of course the practice grows and more birds are thus marked, including now even more migratory birds such as the partridge. It would be a pity if any discovered ring were not reported. Perhaps the best thing to do is to report the occurrence with the numbers on the ring to H. F. Witherby, British Birds, 820 Holborn. Mr. Witherby, with other apostles of this method of testing migration, has helped to make many discoveries in the way of a bird in the air. The system is now almost world wide ; and is followed with especial ardour and thoroughness in Southern Ontario and in the northern parts of the United States. W. BrAcn THOMAS.