Abstract
In 2002, young Japanese Cranes Grus japonensis held captive in a facility located next to the winter feeding station in Hokkaido showed symptoms of Disseminated Visceral Coccidiosis (DVC). Screening revealed the presence of oocysts of the coccidia Eimeria gruis and Eimeria reichenowi in the feces of wild cranes, the first record of this infection in wild cranes in Hokkaido. Coccidian oocysts were distributed throughout the entire habitat area, though no serious effects have yet occurred. Given the high density of cranes at winter feeding stations and the decrease of the breeding habitat in Japan, the potential danger posed to the natural crane population by eimerian coccidiosis should be an important concern in the wildlife management practices for this species.
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