1982 年 14 巻 2-3 号 p. 254-269
Ecological studies of Tristram's Woodpecker, Dryocopus javensis richardsi Tristram, were made for five years, 1976-1981 in the central part of Korea. A pair laid 3-4 eggs each year changing their nesting site. All the trees where they nested were situated within 500 meters from permanently running water. The breeding period lasted from late April through late July. The trees where the woodpecker had their roosts or bred were huge old or half-dead coniferous or broad-leaf trees, on average 200 years old. The incubation and feeding periods lasted for 14 days and 26 days, respectively. The parents shared the time of the incubation and feeding but the male spent longer than the female especially in the feeding period. The ratio of time shared by the female and the male with the nestlings was 3:7. The diet of the nestlings consisted of the larvae of Malombyx raddie-71.6% and Myelophilus piniperda-25.6%, and the eggs and the adults of Camponotus berceleanus-2.8%, with small amount of Miriapoda. The home range and the territory of the woodpecker had a radius of 2km and 40m, respectively, with the nesting tree at center. The preservation of old or half-dead trees within 500m from permanently running water is essential. Nest-boxes should be installed to reduce competition among birds nesting in the hollow trees. Food plants such as Cornus controversa should be planted.