FOUR previous papers have appeared in British Birds giving the results of field observations on the biology of the Marsh Tit (Parus palustris), based on a study of colour-ringed and some unringed individuals in a 50-acre tract of W e s t Wood, Bagley, N. Berkshire. The study was begun in 1938 by H. N . Southern and continued from 1939 to 1942 by the present writer, who wishes to record here her gr...
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