Movements of imperial eagle Aquila heliaca juveniles and description of monitored areas in the border zone between Austria, Hungary and Slovakia

Abstract

Abstract Five juveniles of the imperial eagle were tracked during 2011-201 2. Movements were monitored in the western part of Slovakia and in the border area between Austria, Hungary and Slovakia. Three eagles came from the Záhorská nížina Lowlands and the others from the Malé Karpaty Mts and the Podunajská nížina Lowlands. Post-fledging movements were recorded in areas around the nests. Post-fledging areas covered a large territory (minimum convex polygons - 89, 941 , 969 km2). During the postfledging period the eagles carried out exploratory flights (1 2-33 km from the nest). One temporary settlement area (TSA) was identified in the border area between Austria, Hungary and Slovakia (minimum convex polygon - 68 km2). Two eagles with radio transmitters were recorded in this area. In the TSA and the post-fledging areas two habitat categories were dominant: arable land and forests. Heterogeneous agricultural areas were also important in the TSA (8%). Abstrakt Pocas rokov 2011 a 201 2 bolo monitorovaných pät juvenilov orla královského. Pohyby boli monitorované v západnej casti Slovenska a v pohranicnej oblasti medzi Rakúskom, Madarskom a Slovenskom. Tri orly pochádzali zo Záhorskej nížiny a ostatné z Malých Karpát a Podunajskej nížiny. Pohyby po opustení hniezda boli zaznamenané v oblastiach okolo hniezd. Oblasti využívané po vyletení z hniezda pokrývali velké územie (minimálny konvexný polygón - 89, 941 , 969 km2). Pocas obdobia po vyletení z hniezda orly vykonávali prieskumné lety (1 2-33 km od hniezda). V pohranicnej oblasti medzi Rakúskom, Madarskom a Slovenskom bolo identifikované jedno docasne osídlené územie (minimálny konvexný polygón - 68 km2). Dva orly s rádiovou vysielackou boli zaznamenané v tomto území. V územiach obývaných po vyletení z hniezda a v docasne osídlenom území boli dominantné dve kategórie biotopov - orná pôda a lesy. V docasne osídlenom území boli tiež významné heterogénne polnohospodárske oblasti (8%).