Camera-trapping estimates of the relative population density of Sympetrum dragonflies: application to multihabitat users in agricultural landscapes oleh Akira Yoshioka, Toshimasa Mitamura, Nobuhiro Matsuki, Akira Shimizu, Hirofumi Ouchi, Hiroyuki Oguma, Jaeick Jo, Keita Fukasawa, Nao Kumada, Shoma Jingu, Ken Tabuchi