Pachycnemia hippocastanaria

Pachycnemia hippocastanaria, the horse chestnut moth, is a moth of the family Geometridae. It is found in most of Europe.

Pachycnemia hippocastanaria
Scientific classification
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P. hippocastanaria
Binomial name
Pachycnemia hippocastanaria
(Hübner, 1799)
Synonyms
  • Geometra hippocastanaria Hübner, 1799
Illustration from John Curtis's British Entomology Volume 6
Larva

The wingspan is 28–32 mm. Adults are on wing from April to May, and again in a partial second generation in August, usually with fewer and smaller moths.

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