The long-streak sailor is a black-and-white butterfly of East Asian mountain forests. When it glides with its wings held flat, the white bands line up into three neat stripes across the wings. It does not occur in the United States—it lives in Japan, Korea, China, Taiwan, and the Russian Far East.
Appearance
- Appearance
- Wings are black above with three white bands and reddish brown below with the same pattern. The wingspan is about 2½ in (6–7 cm), and females are larger than males.
Where it lives
- Typical habitats
- Broadleaf and mixed forests
- Forest edges
- Mountain valleys
- Range
- East Asia: Japan, the Korean Peninsula, China, Taiwan (in mountains), and the Amur and Ussuri regions of the Russian Far East. It is not found in the US.
Behavior
- Activity
- It flies with a few flaps and then a long glide, often high among trees. Adults rarely visit flowers and often land on damp ground to drink.
- Overwintering
- As a caterpillar resting on a dead maple leaf that it ties to a twig with silk.
Life cycle
- Breeding season
- One generation a year, flying roughly May to August depending on region and elevation.
- Caterpillar food plants
- In Japan, caterpillars feed on maple leaves, including Japanese maple.
Conservation
- IUCN Red List
- NENot EvaluatedNot yet assessed
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