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Article
Robert Spencer, Auteur ; Yvan I. Russell, Auteur ; Benjamin J. A. Dickins, Auteur ; Thomas E. Dickins, AuteurCapsule: Kleptoparasitism in gulls occurred at a greater rate at an urban compared with a coastal site. Population density and prey size predicted the rate of kleptoparasitism at the urban site.Aims: To investigate and assess the ecological vari[...]
Article
Article
Robert Spencer 1959-07-01Ibis, 101(3-4)Summary. 1 The main features of the first fifty years of British ringing are described. 2 Recovery rates are discussed. It is suggested that man's interest in a species is the most important determining factor. 3 A brief assessment is made of th[...]
