| Catocala fraxini | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Lepidoptera |
| Family: | Noctuidae |
| Genus: | Catocala |
| Species: | C. fraxini |
| Binomial name | |
| Catocala fraxini (Linnaeus, 1758) |
|
The Blue Underwing (Catocala fraxini), also known as Clifden Nonpareil, is a moth of the superfamily Noctuoidea. It is found in Europe and North and East Asia.
The caterpillars feed on various species of poplar.