I am interested in behavioural ecology and evolutionary biology, with special attention to the brood parasitic common cuckoo (Cuculus canorus) and its great reed warbler (Acrocephalus arundinaceus) host. My experimental fields are in wetland habitats in central Hungary. I am interested in the evolutionary adaptations of the pattern of eggshell maculation in cuckoos and great reed warblers. I also study the hygienic environment of nests of great reed warblers through eggshell bacterial flora samples. I also take part in studies on optimal laying strategy of cuckoos, and in spatial, territorial and social relationships of brood parasites, using radio telemetry and playback experiments.