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In the years 2009-2012 a total of 316 individuals were marked in a colour ringing programme of the population ofA. pomarina in Slovakia. From this a total of 39 inds. were ringed with yellow readable plastic rings with a two-place alphanumeric code (all young in a nest) and 277 inds. (273 young and 4 adult inds.) with light-blue rings. For the entire period of the programme of marking the A. pomarina population in Slovakia in the years 2000-2012 a total of 952 inds. were ringed, 933 of which were young birds in nest and 19 adult individuals. In the period 2009-2012 48 records were obtained from observations of 35 individuals of different age categories (31 individuals from one to 11 years old, three of unknown age and one young individual about one month after fledging the nest). The age categories of immature individuals were determined, and six were found to be one-year-old individuals (12.5%) in the second calendar year of life after their first return from wintering grounds, six were two-year-old eagles (12.5%) and five were three-year-old eagles (10.4%) which spent breeding periods in Europe at a relatively small distance from their place of hatching. Adult individuals were found to be in their current breeding grounds at distances of 8-249 km from their hatching place. In the period 2000-2012 three individuals were recorded 3× and four individuals 2×. The results confirm breeding site fidelity in adults, but also the fidelity of immature individuals to their hatching place, and the return of one-year-old individuals from their wintering grounds to the vicinity of their hatching place immediately in the first year of life (that is, in the second calendar year). Abstrakt V rokoch 2009-2012 sa na Slovensku oznacilo v programe farebného znacenia populácie A. pomarina 316 jedincov. Z toho žltými odcítatelnými plastovými krúžkami s dvojmiestnym alfanumerickým kódom spolu 39 jedincov (všetko mládatá na hniezde) a svetlomodrými krúžkami 277 jedincov (273 mládat a 4 adultné jedince). Za celé obdobie programu oznacovania populácie A. pomarina na Slovensku v rokoch 2000-2012 bolo oznacených 952 jedincov, z toho 933 mládat na hniezde a 19 dospelých jedincov. V období 2009-201 2 sa zistilo 48 záznamov o pozorovaní 35 jedincov rôznych vekových kategórií (31 jedincov jeden až jedenástrocných, tri jedince neznámeho veku a jeden mladý jedinec cca jeden mesiac po vyletení z hniezda). Determinované boli vekové kategórie immaturných jedincov, z ktorých bolo 6 jednorocných jedincov (12,5 %) v druhom kalendárnom roku života, po prvom návrate zo zimoviska, šest dvojrocných orlov (12,5 %) a pät trojrocných orlov (10,4 %), ktoré sa zdržiavali v hniezdnom období v Európe v relatívne malej vzdialenosti od miesta vyliahnutia. Adultné jedince boli zastihnuté vo vzdialenosti 8-249 km od miesta svojho vyliahnutia na svojich terajších hniezdiskách. V období rokov 2000-2012 tri jedince boli zaznamenané už 3×, štyri jedince 2×. Výsledky potvrdzujú vernost k hniezdisku u dospelých, ale aj vernost immaturných jedincov k miestam ich vyliahnutia a návrat jednorocných jedincov zo zimoviska do blízkosti miest ich vyliahnutia hned v prvom roku svojho života (teda v druhom kalendárnom roku).

Colour ringing programme of the lesser spotted eagle (Aquila pomarina) population in Slovakia and its new results in the period 2009–2012