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Article
Ronald Mulsow, Auteur ; Luisa Wieczorek, AuteurAfter numerous publications about changes of the first arrival of migratory bird species, we tried to clarify which changes within the circannual cycle are happening in the study area. For this purpose, we used all available bird records from Ha[...]
Article
Alexander Mitschke, Auteur ; Stefan Garthe, Auteur ; Ronald Mulsow, AuteurStudies of the long-term population development of common breeding birds in the urban environment are scarce. We studied 15 census plots in the city of Hamburg in the 1990s, all of which had been investigated for the first time in the 1960s or 1[...]
