Home / Saturniidae Moths (Saturniidae) / Spanish Moon Moth (Graellsia isabellae)

Spanish Moon Moth (Graellsia isabellae)

Spanish moon moth of the Saturniidae family was described first in 1849 by Spanish entomologist Mariano de la Paz Graells y de la Agüera. This moth is native to parts of France and Spain, mostly occupying the pine forest regions.

Spanish Moon Moth


Scientific Classification

  • Family: Saturniidae
  • Genus: Graellsia
  • Scientific Name: Graellsia isabellae

Description and Identification


The larvae hatch in 1 or 1.5 weeks and start eating hard pine needles. Their last instar is reached in about 1.5 months, and at this time, they climb down the trees pupating within the leaves that lie on the ground.

Spanish Moon Moth Caterpillar



Not much detail remains available about the pupal stage of the Spanish moon moth. However, the pupa remains in the cocoon throughout the winter and emerge into an adult moth in spring.

Spanish Moon Moth Pupa


Adult Moth

Sexual Dimorphism: Present

The males have longer tails than females.

Color and Appearance: When the wings are opened, they are green with four prominent eyespots and a light brown border, as well as an extended tail. When the wings are closed, the color mostly remains the same, with two of the four eyespots visible.

Average wingspan: 6.35 – 10.16 cm 

Flight pattern: Not recorded

Season: April – September

Male Spanish Moon Moth


Female Spanish Moon Moth



The eggs are green and round, mostly laid near the pines.

Quick Facts

DistributionFrance and Spain
HabitatDry and mountainous pine forest regions
Lifespan of adultsAbout a week
Host plantsPine
Adult dietPine trees (while the larvae eat pine needles)

Did You Know

The Spanish moon moth is crossed with the Indian moon moth to produce a hybrid.

Spanish Moon Moth Image


Graellsia isabellae


Spanish Moon Moth Picture


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