Raven Corvus corax breeding in Gray Heron Ardea cinerea colonies in continental Croatia

Ravens were observed near the breeding colonies of Grey Heron in the Lipovljani forest on 2nd April 1999, in the Trebovec forest on 2nd April 1999 and 29th March 2001, in the Piljenice forest on 5th April 2001. Raven in the nest on forest edge tree was recorded inside Grey Heron breeding colony in Kravarsko on 2nd April 1999. It can be concluded that a breeding pair of Ravens, whose diet includes heron’s eggs and nestlings, accompanies every heron’s colony