These are white-tailed skimmers (Orthetrum albistylum). The dragonfly is found across Asia and Russia. Males and females can be distinguished by color. Males are bluish while females are yellowish. The thing is young males are also yellowish, which makes it difficult to distinguish young males from females.
The white-tailed skimmer dragonfly is called "shiokara tombo" in Japanese, which translates to "salty dragonfly" because of a white powdery substance developed on its' abdomen.
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| 2025/8/2 Female |
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| 2022/8/13 Male |
