赤坂御用地に生息するタヌキのタメフン場利用と食性について Utilization of Fecal Pile Sites, and Food Habit of the Raccoon Dog (Nyctereutes procyonoides) in the Akasaka Imperial Gardens, Tokyo
On the raccoon dog (Nyctereutes procyonoides) in the Akasaka Imperial Gardens, we examined the fecal pile sites by using the sensor cameras and the food habits by analyzing the fecal contents. We confirmed ten fecal pile sites in the Gardens and took totally 191 photographs of the raccoon dogs in the sites. Each individual was similar in external appearance, and the mange was not observed in the photographs. From the photograph data, we suggest that the animal may also use the fecal pile sites as feeding areas. The seasonal changes of use frequency were demonstrated in some sites. The raccoon dogs were fairly active in both daytime and night time during the period of the examinations. The raccoon dogs mainly fed on insects, fruits, myriapods and small birds. Seasonal change of food habits was indicated and the coprophagous and coprophilic insects were exclusively confirmed in colder season. We suggest that the raccoon dogs may maintain the fecal piles to secure foods in sites in winter.