Abstract: The national Red List was updated for the period 2013–2023, based on the improved knowledge and the change in the conservation status of some rare bird species. IUCN categories and criteria according to version 3.1 were used and recommendations for their application according to version 15.1. Version 4.0 of the IUCN recommendations was taken into account for the application of the criteria at the national and regional levels. Altogether 213 native breeding species were assessed (of the total number of 233 species of breeding birds). A total 94 of 213 native species met the criteria for inclusion in the Red List (five species RE – regionally extinct, 12 CR – critically endangered, 24 EN – endangered, 29 VU – vulnerable, and 24 NT – near threatened), which represents up to 40% of the species of the breeding avifauna in Slovakia. The remaining 119 species are less threatened (LC) species and these were not included in the Red List. Threatened birds (categories CR, EN, VU; 65 species) cover 31% of all assessed Slovak breeders. The total number of threatened species increased from 51 to 65 in comparison to the period 2002–2012. The status of 36 assessed breeders has worsened and, conversely, 11 species have been reclassified to a more favorable category due to improved population status.

Key words: biodiversity, bird conservation, IUCN, regional Red List, threats