Kingdom: Animalia
Subkingdom: Eumetazoa
Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Lepidoptera
Superfamily: Lasiocampoidea
Family: Lasiocampidae
Subfamily: Lasiocampinae
Genus: Lasiocampa

The Oak Eggar belongs to the larger and more frequent moths. Females are much larger than males and are yellow-brown in color. Males are smaller and the color of the wings is reddish brown. In addition to appearance, the sexes of this species also differ in behavior. Females are much worse fliers and are active at night when they secrete pheromones that attract males. Males are better fliers and fly during the day using very nervous and fast flight in search of females. Adult moths are active between June and August and inhabit a wide range of habitats including overgrown areas, forests, forest clearings and wetland forests. The caterpillars of this species feed on the leaves of a large number of herbaceous and shrubby plants. The oak hen is present on the entire territory of Croatia.