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Article
Jochen Bellebaum, Auteur ; Wolfgang Maedlow, AuteurAdult sex ratio in ducks is male-biased, probably due to higher mortality of incubating females. In an introduced population of Mandarin Ducks Aix galericulata in Berlin and Potsdam, adult sex ratio (proportion of males) was 0.65 (95% confidence[...]
Article
Wolfgang Maedlow, Auteur ; Norbert Model, AuteurThe population sizes of 75 rare or scarce breeding bird species in Germany in the years 1995 and 1996 are presented (table 1). The data are the result of a survey carried out by the ornithological organisations and nature conservation agencies o[...]
