About Catocala unijuga Walker
Catocala unijuga, commonly known as the once-married underwing, is a moth species that belongs to the family Erebidae. This species was first formally described by Francis Walker in 1858. It is distributed across North America, ranging from Newfoundland westward to south-central British Columbia. In the southern part of its range, it extends to Kentucky and Missouri in the east, and to Colorado and Utah in the west. The wingspan of this moth measures between 68–82 mm (which equals 2.7–3.2 inches). Adult moths are active from July to September, producing one generation per year, with timing varying depending on location. The larvae of Catocala unijuga feed on Populus tremuloides, Populus nigra, and various species of Salix.
