クマゲラ(Dryocopus martius)の巣穴を利用する鳥獣 : クマゲラの繁殖活動が遅れたのはなぜか

概要

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In the summer of 2010, we planned to collect feces from the cavities made by the Black Woodpecker Dryocopus martius in beech forest on Mt. Moriyoshi, Akita Prefecture. We found a group of Japanese Large Noctule Nyctalus aviator in a recently formed cavity and some eggs of the Mandarin Duck Aix galericulata in an older cavity located below the new cavity. The young ones of the Black Woodpecker fledged on July 3 and 4, and this is the latest record of this species from Honshu. We estimated that the breeding activity of the Black Woodpecker was delayed due to the extraordinary climatic conditions this year.
2011-08-01