Aciagrion migratum is a very slender East Asian damselfly that, unusually for a dragonfly, spends the winter as an adult and turns bright blue in spring. It lives in Japan, Korea, China, and Taiwan and is not found in the US. It has no widely used English name.
Appearance
- Appearance
- A very thin damselfly about 1.2–1.5 in (30–38 mm) long. Overwintering adults turn brownish as the weather gets cold, then bright blue (males) or blue to greenish (females) in spring.
- Seasonal forms
- In Japan it has a small summer form and a larger overwintering form, which differ in size and color.
Where it lives
- Typical habitats
- Weedy ponds
- Rice paddies
- Range
- Japan (Honshu to Kyushu), the Korean Peninsula, China, and Taiwan. It does not occur in North America.
- Preferred conditions
- Still, shallow water with plenty of , near woodland where adults can feed and overwinter.
Behavior
- Overwintering
- Overwinters as an adult in thickets along woodland edges.
Conservation
- IUCN Red List
- LCLeast ConcernLow risk of extinction
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