アオモンイトトンボ March bluetail / Ischnura senegalensis
オスの尾の先に、きれいな青い「紋」があるアオモンイトトンボ。英語の通称も「bluetail(青い尾)」なんですね。胸部もきれいな青色、光の具合で明るい緑にも見えます。おもしろいのはメスの色合い。オスとよく似た「オス型(同色型)」のメスと、オスと違う色の「メス型(異色型)」のメスがいるのだそうです。さがしてみると、いました。Ischnura senegalensis, commonly known as March bluetail (according to some web sites), has a Japanese name which means “damselfly with a blue spot”. A male, as indicated by its names, has a blue spot at the end of abdomen and a blue thorax which looks lime green depending on the light condition. In the case of females there are two types; One is andromorph with a pattern very similar to that of males, and the other is gynomorph of a yellowish brown colour.このメスは「オス型」です。胸部も尾の先も鮮やかな青色です。This female is an andromorph. She has a blue thorax and a blue ring on her tail.こちらは「メス型」のメス。オスとは違い、柔らかい黄褐色です。This one is a gynomorph. Her body is soft yellowish brown.ところでトンボって、色がわかるのでしょうか??? Can they, by the way, see colour???September 2006 西宮 / Nishinomiya, Hyogo