A three-year-old elk was necropsied in Kampinos Forest, near the village of Granica. An analysis of a 3g faecal sample from the animal revealed the presence of 130 oocysts of Eimeria catubrina. The parasite is typical of roe deer; this study is only the second reported observation of E. catubrina in elks. As coccidia are so rarely found in elks, this observation of E. catubrina in this new localization is a matter of concern.