Critically retreating species of birds; 1 : 750 000, map fragment

Populations of the quoted bird species were reduced in such an extent in the 20th century that they are critically endangered now. Great bustard (Otis tarda) inhabited above all the southern part of the Podunajska nizina Basin and the middle part of valley of the Ipel. Its population broke down into small flocks after 1975. Only the last several individuals survive now and the species is critically endangered. Ortolan bunting (Emberiza hortulana) is also critically threatened bird species in Slovakia. The last known localities of its occurrence are on the south-eastern slopes of the Male Karpaty Mts. Eurasian curlew (Numenius arquata) bred in the region of Zahorie on the inundated meadows of the Morava river and on the foothills of the Male Karpaty Mts. in the past, and probably also in Zitny ostrov. It is critically endangered now. (author)