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Article
Christof Herrmann, Auteur ; Hans Wolfgang Nehls, Auteur ; Jens Gregersen, Auteur ; Wilfried Knief, Auteur ; Rolf Larsson, Auteur ; Jaanus Elts, Auteur ; Maria Wieloch, AuteurAt the beginning of the 20(th) century, the Baltic Sea did not form part of the breeding range of the Sandwich Tern. However, during the first half of the century the species expanded its range gradually to the northeast, colonising Skane in 191[...]
Article
Christof Herrmann, Auteur ; Hans Wolfgang Nehls, Auteur ; Jens Gregersen, Auteur ; Wilfried Knief, Auteur ; Rolf Larsson, Auteur ; Jaanus Elts, Auteur ; Maria Wieloch, AuteurAt the beginning of the 20(th) century, the Baltic Sea did not form part of the breeding range of the Sandwich Tern. However, during the first half of the century the species expanded its range gradually to the northeast, colonising Skane in 191[...]
Article
Peter Suedeck, Auteur ; Bernd Haelterlein, Auteur ; Wilfried Knief, Auteur ; Ulrich Koeppen, AuteurIn 1995, 7557 breeding pairs of Common Tern and 7329 pairs of Arctic Tern were counted along the German coasts. This is over 25 % less than in a similar survey 1939 (SCHULZ, 1947). The population development of each species is described separate[...]
Article
Wilfried Knief, Auteur ; Olaf Ekeloef, Auteur ; Claus Ivens, Auteur ; Walther Petersen-Andresen, AuteurLike in other parts of western central Europe populations of Black Terns breeding in Schleswig-Holstein decreased by 90% during the past 50 years, the present population being 100-120 pairs. The range of Black Terns in Schleswig-Holstein also de[...]
Article
Bernd Haelterlein, Auteur ; Peter Suedbeck, Auteur ; Wilfried Knief, Auteur ; Ulrich Koeppen, AuteurThe German coasts of the North and the Baltic Sea represent important breeding grounds for several bird species with high proportions of the
