Mothing
Guides
Catocala unijuga
once-married underwing, once-married underwing moth
Catocala unijuga is a large underwing moth in the family Erebidae, first described by Francis Walker in 1858. Adults are characterized by cryptic forewings that conceal brightly patterned hindwings, a trait shared across the genus Catocala. The species is distributed across northern and western North America, with larvae feeding on poplars and willows. Adults fly from July to September in a single annual generation.