赤あかとんぼ

noun

red dragonfly

General term for small red dragonflies, especially the common autumn darter.

• 秋あきになると、赤あかとんぼがたくさん飛とんでいる。

  In autumn, many red dragonflies are flying around.

noun

darter; meadowhawk

Specifically refers to dragonflies of the genus Sympetrum, especially Sympetrum frequens.