Alivizatos, H., Kazantzidis, S., & Birtsas, P. (?????.).  (2006).  WINTER DIET OF THE MARSH HARRIER (Circus aeruginosus) IN EVROS DELTA, GREECE. ??? 10th International Congress on the Zoogeography and Ecology of Greece and Adjacent Regions. ????????????? ??? 26-30 June, Patra: Hellenic Zoological Society, Hellenic Ornithological Society, Hellenic Ministry of Rural Development, Section of Animal Biology (Dept. Of Biology, Univ. of Patras).