Zbyryt, A., Mitrus, C., & Neubauer, G. (2024). Productivity of the Great Egret (Ardea alba) and Grey Heron (A. cinerea) in mixed heronries in Poland and behavioral response of fledglings to a drone. Ornis Fennica, 100(4), 144–158. https://doi.org/10.51812/of.119429 (Original work published January 22, 2024)