Bal, D. F, Davenport, L. J & Wallis, A / December 1981 – vol. 74, issue 12, pp 533–539 Wintering Bitterns in Britain The recent paper by Dr C. J. Bibby on wintering Bitterns Botaurus stellaris in Britain (Brit. Birds 74: 1-10) illustrated that the population is supplemented in winter by immigration to this country of Bitterns from Continental Europe. Dr Bibby also suggested that the number of Bitterns correlates well with hard-weather movements. Whereas this may be true, there is... This article is only available to registered users.To read more, please log in or purchase a subscription.