sentences:  Breeding success in Hungary reportedly was driven largely by the age of the nesting pair, with mature adults more likely to show adaptability to changes in habitat and prey, and secondarily to habitat composition.In particular, nesting success tends to higher in lowland areas against higher elevation nests.Post-dispersal in Bulgaria, the most significant cause of juvenile mortality per radio-tagging studies was shown to be electrocution (59% of the mortalities), followed by poisoning and shooting.