Der Median für alle Aktionsräume der Männchen lag bei 63,6 km 2. Bei 27 Männchen, die 47-mal erfolgreich Jungmilane aufzogen, konnten Aktionsräume von 4,8 bis 507,1 km 2 nach der Kernel 95 %-Methode für die Zeit der Jungenaufzucht ermittelt werden. 43 adulte Individuen wurden zwischen 20 in Thüringen mit Sendern markiert, deren Ortung mittels GPS bis auf wenige Meter genau erfolgte. Über die Raumnutzung und die Aktionsraumgröße beim Rotmilan ( Milvus milvus) während der Fortpflanzungsperiode gibt es bisher keine verlässlichen Untersuchungen. GPS-Telemetrie beim Rotmilan (Milvus milvus) zeigt negative Korrelation zwischen Jungvogelzahl und Aktionsraumgröße In conclusion, home rage size serves as a useful indicator of Red Kite habitat quality, which may provide key conservation information at the wider ecosystem level. Adults sometimes travel very long distances to visit distant grasslands during and shortly after mowing (up to more than 34 km) from the nest, due to the increased likelihood of prey availability at these sites. Birds with very small or very large home ranges differed considerably from these average figures. Fifty-six, 37, and 26 % of male kite fixes were beyond a 1, 1.5, and 2 km radius around the nest, respectively. The relationship between the number of fledged young and home range size was modelled using a cumulative logit model. Individuals with more nestlings had intermediate-sized to small home ranges. Kites with very large home ranges had only one fledgling, which indicates that resources were scarce. For individual males at the same nest site, the home range size varied up to a factor of 28 across years. Across years, the median home range size of all males ranged between 21 and 186 km 2, depending on prey availability. There was also considerable variation in the home range size of adults during the course of a season. Within a single breeding season, there were considerable differences among home range sizes. The home ranges of 12 females, with a total of 21 successful broods, ranged between 1.1 and 307.3 km 2. The median during the nestling and post-fledging dependent periods was 63.6 km 2. The home range sizes of 27 males, which successfully reared 47 broods, ranged between 4.8 and 507.1 km 2 based on the 95 % kernel utilization distribution. Between 20, 43 adult individuals were fitted with GPS transmitters in Germany. To date, reliable studies on the spatial area use and home range size of the Red Kite ( Milvus milvus) during the breeding season are lacking.
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