| Titre : | Ornithologischer Anzeiger, 62(supplement) - July, 2025 - Atlas des Zuges bayerischer Brut- und Gastvögel nach Ringfunden |
| Type de document : | Bulletin : Périodique |
| Paru le : | 01/07/2025 |
| Année de publication : | 2025 |
| Langues: | Anglais ; Allemand |
| Mots-clés : | atlas ; Migration ; Allemagne ; Aves |
| Résumé : |
The paper describes the migratory behaviour of Bavarian birds using recoveries of birds ringed in Bavaria, or ringed outside Bavaria and recovered in Bavaria. We considered all recoveries with reter-ence to Bavaria in the database of the Center for Animal Marking at the Max Planck Institute of Animal Behavior, Radolfzell, as of May 2021. Multiple recoveries from ring-reading of live birds or recaptured birds were only taken into account if they did not occur at the same location in the same period and in the same year. This resulted in 30,832 recoveries of 19,094 birds ringed in Bavaria for 197 species with at least one recovery used for further analyses.
Recoveries of birds ringed in Bavaria date back to 1914, with most ringing occurring in the 1950s and 1960s and in recent decades. Over the course of the year, most birds were ringed during the breeding season, mainly due to the ringing of nestlings. The findings of ringed birds are distributed fairly evenly throughout the year. The higher values in August are mainly due to the higher number of ringed White Storks during this period. For further analyses and mapping the following recoveries were considered: (1) recoveries of birds ringed during the breeding season or in autumn in Bavaria and found at least 100 km from the ringing location outside Bavaria outside the breeding season, (2) recoveries of birds ringed in autumn or winter in Bavaria and found during the breeding season outside Bavaria, and (3) recoveries of birds ringed outside Bavaria and found in autumn or winter in Bavaria. Maps were only produced for species with more than ten records. For all other species with at least one recovery the recoveries are only mentioned in the text. The number of recovery locations shown in the maps may differ from the number of recoveries mentioned in the figure legend, as there may be several recoveries at one location. Ringing and recovery periods were defined uniformly for all species: breeding season': April-July,'autumn': August-November, and 'winter': December-February. The standardised definition of the 'breeding period' does not fully cover the species-specific breeding periods for species that breed earlier in the year, or migratory birds that arrive later in the year, but it does adequately reflect the breeding period for the vast majority of species. Similarly, species that migrate early in the year may already be in their wintering grounds in October/November and no longer on 'autumn migration'. For all species with more than 30 recoveries, supplementary illustrations show the year of ringing of later recovered birds, the month of ringing and recovery, the causes of death, and the recovery distances (distance between ringing location and recovery location) summarised in distance classes. For many species the migration patterns could be well described. However, temporal changes due to landscape and climate change are almost impossible to assess because of the rather sporadic ringing activities over time for many species. Consequently, we recommend an intensification of ringing, specifically of common species, in order to enable the monitoring of future changes in migratory behaviour. |
Exemplaires (1)
| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| 16667 | 5B/4 | Périodique | Bibliothèque | Périodiques étagère 5 | Disponible |
