Cullen, M. S & Pratt, R / March 1976 – vol. 69, issue 3, pp 88–90 The history of the increase in the number of nests comprising the colony of Gannets Sula bassana on Grassholm is well documented, with records of periodic counts between 1860 and 1969. This short paper gives details of the 1975 count, the method used and certain observations made. METHOD AND OBSERVATIONS The 1975 count was made from aerial photographs taken during the 1975 breeding sea... This article is only available to registered users.To read more, please log in or purchase a subscription.