Abstract

BURKITT, J. P. 1926. A study of the robin by means of marked birds. Brit. Birds, 20:91-101. FARNRE, D. S. 1949. Age groups and longevity in the American robin: comments, further discussion, and certain revisions. Wilson Bull., 61(2):68-81. HALDANE, J. B. S. 1955. The calculation of mortality rates from ringing data. Acta XI Congr. Internat. Ornith., 454-458. OLssoN, V. 1958. Dispersal, migration, longevity and death causes of Strix aluco, Buteo buteo, Ardea cinerea, and Larus argentatus. Acta Vertebratica, 1(2):89189.

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