Ringed birds in snow Sirs,--During the snowy period of early January 1962, in my garden sanctuary near Welwyn, Hertfordshire, I saw two ringed birds, a Blue Tit (Pants caerukus) and a Long-tailed Tit (Aegithalos caudatus), with their rings thickly coated with frozen snow. They came to the fteeding trays in this condition on a number of occasions. The additional weight of this cold "bracelet" must su...

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