Kivonat:

Distribution and abundance of the Great White Egret (Egretta alba) wintering on Dravsko polje in northeastern Slovenia were studied during 1985-1996. The wintering population of Great White Egret increased in the last years. About 30% (up to 50 individuals) of the entire Slovene wintering Great White Egret population was on Dravsko polje. Great White Egrets preferred waters and avoided arable lands during all studied months (October-March). They foraged in small groups. Feeding flocks were mobile and reformed after disturbance in new areas of the study site. The number of Great White Egrets and Grey Herons (Ardea cinerea) correlated in the study area.