2012 International Congress of Odonatology. Odawara, Japan. 2012
Miscellaneous / Dragonflies flying in July and August
Overview
About 200 dragonfly species distribute in Japan. In a local (each Prefecture), we can find about 90 species through a year.
In the period of the Congress from late July to early August, you may find 20-40 species in a day-trip. We will introduce some of them.

Pool/Pond dwellers
C. melanurum & N. pygmaea
Left: Ceriagrion melanurum: common, a pond dweller.
Right: Nannophya pygmaea: rare, living in boggy area.
P. melanictera & A. anisoptera
Left: Polycanthagyna melanictera: rather common, a crepuscular species.
Right: Aeschnophlebia anisoptera: rare, also a crepuscular species.
S. clavatus & E. elegans
Left: Sinictinogomphus clavatus: common.
Right: Epophthalmia elegans: common.
R. fuliginosa & P. zonata
Left: Rhyothemis fuliginosa: common in ponds with rich vegetation.
Right: Pseudothemis zonata: common in ponds with poor/no vegetation.

Riverine Species
A. atrata & P. foliacea sasakii
Left: Atrocalopteryx atrata: very common.
Right: Platycnemis foliacea sasakii: rare and restricted, -
- fan-shaped tibia for the use of sexual display.
C. cornelia & O. viridicostus
Left: Calopteryx cornelia: common, the largest Calopterygid in Japan.
Right: Onychogomphus viridicostus: common.
S. albardae & S. oculatus
Left: Sieboldius albardae: common, the largest gomphid in Japan.
Right: Stylurus oculatus: common but restricted. also living in large lakes.
B. maclachlani & A. sieboldii
Left: Boyeria maclachlani: common.
Right: Anotogaster sieboldii: common, the largest dragonfly in Japan.

Epiophlebia superstes
Epiophlebia superstes
Left: an adult male: usually close the wings while perching.
Right: F-1 larvae: F-1s in different color but F-0s only black ones.
Adults disappear by July, so you can find only larvae.