Ducetia japonica
This leaf green katydid holds its wings folded flat over its back so closely that its outline on a shrub can pass for a single curled leaf.
| Where | Forest edges and grassland, East Asia |
|---|---|
| Size | 30 to 40 mm body length |
| When | June to November |
A medium sized katydid, light green or brown overall, with a narrow darker stripe running from behind the eye along the back; the long wings are held tent like over the body at rest.
It lives along forest edges and in tall grass and shrubs from lowlands to hills, feeding on leaves and soft plant tissue, with adults most often seen from early summer into late autumn.
Traits
Habitat
Grassland
Colour
Green, Brown
Active
Night
To people
Harmless to people; it feeds only on plants and does not bite or sting.
Activity through the year
Often confused with
A similarly leaf green katydid with plain, unstriped wings, lacking the darker stripe that runs along the back of this species.
Questions
Is Ducetia japonica dangerous to people?
Harmless to people; it feeds only on plants and does not bite or sting.
When can you see Ducetia japonica?
Ducetia japonica can be seen from June to November, at night.
Plate retouched from a photo by りなべる, CC BY 4.0, iNaturalist Licence
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Crickets and grasshoppers›Bush crickets›Ducetia
Last updated 2026-09-27. Every entry is checked against published sources.