U字溝用水路内で越冬するトウキョウダルマガエルの観察例
2007年09月
爬虫両棲類学会報 2007（2） P127-128.
伊藤 寿茂
Abstract: Rana porosa porosa wintering in a U-shaped concrete ditch along a paddy field were observated at Oba, Fujisawa City, Kanagawa Pref., central Japan. There was a little mud and dry grass in the ditch. When a concrete block in the ditch was lifted, the frog dug into the substrate and crouched there.
著作権：日本爬虫両棲類学会
2009年1月, 日本爬虫両棲類学会より転載許可