Common Rustic vs Pale Grass Blue

Side-by-side species comparison

Attribute	Common Rustic	Pale Grass Blue
Scientific Name	Mesapamea secalis	Zizeeria maha
Order	Lepidoptera	Lepidoptera
Family	Noctuidae	Lycaenidae
Size	26-34 mm wingspan	15-25 mm wingspan
Habitat	Farmland	Meadows
Diet	Herbivores	Nectar Feeders
Regions	Europe	East Asia, Japan/Korea
Conservation	Least Concern	Least Concern

Common Rustic

A highly variable common moth that forms a species complex with the Lesser Common Rustic. External appearance is unreliable for identification. Larvae feed inside grass stems.

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Did You Know?

So similar to its sibling species that they were not recognized as separate species until 1983.

Pale Grass Blue

One of the smallest and most common butterflies in Japan, known as 'yamato-shijimi.' Found everywhere from city sidewalks to mountain meadows. Pale blue upperwings with spotted undersides.

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Did You Know?

This butterfly became an unlikely research subject after Fukushima, as scientists documented radiation-induced mutations in populations near the disaster site.