Pojavljanje vodnih ptic in ujed na območju vodnega zadrževalnika Medvedce (Dravsko polje, SV Slovenija) v obdobju 2002-2008 Between 2002 and 2008, 251 systematic surveys of waterbirds and raptors were carried out during 10-day periods. The main objective of the research was to ascertain the numbers and temporal dynamics of the birds occurring at the reservoir and to define their status. During the research period, more than half of the reservoir was constantly under water between March and October owing to the fishfarming purposes, with fields prevailing in its vicinity. By taking into consideration some older data, 115 species of waterbirds and raptors were registered in the area by the end of 2008, 108 of them during the 2002-2008 period. The status of each species is given quantitatively with different categories of their abundance and occurrence frequency, while data for species occurrence dynamics with more than 10 are presented in the species overview. Confirmed and probable breeding was ascertained for 33 species, while another two were confirmed to breed in the vicinity of the research area. Most of the species (100) have passage migrant status; 13 of these were recorded only once in the 2002-2008 period. Five species were present all the year round. The highest number of species was recorded during the two migration periods, in the spring between end of March and the first half of April, in the autumn between the second half of August and early September (mean value of 32-40 species). The lowest number of species, usually around 10, was registered in the winter period, when the reservoir was for the most part empty or frozen over. The total number of individuals was again highest during the migration period, although significantly higher in autumn than in spring. The highest number of birds was usually recorded between the end of August and mid-September (median between 4,500 and 5,000 individuals). During the 2002-2008 period, it was only the Grey Heron Ardea cinera that frequented the reservoir during all our visits, while in more than 90% of our visits the Great Egret Casmerodius albus and the Mallard Anas platyrhynchos were registered. 32 species were observed less than ten times. The three most abundant species, i.e. the Coot Fulica atra, the Mallard and the Black-headed Gull Larus ridibundus, constituted 76.1% of all counted birds. Dominance was higher than 0.1% in 26 species. The Mallard and the Coot were in most of the years eudominant species in the warmer half of the year.