The Noctuidae, commonly known as owlet moths, cutworms or armyworms, are a family of moths. They are considered the most controversial family in the superfamily Noctuoidea because many of the clades are constantly changing, along with the other families of the Noctuoidea. It was considered the largest family in Lepidoptera for a long time, but after regrouping Lymantriinae, Catocalinae and Calpinae within the family Erebidae, the latter holds this title now. Currently, Noctuidae is the second largest family in Noctuoidea, with about 1,089 genera and 11,772 species. This classification is still contingent, as more changes continue to appear between Noctuidae and Erebidae.
Adult: Most noctuid adults have wings with a variety of shades of browns, grays, and other varied shades and colourations but some subfamilies, such as Acronictinae and Agaristinae, are very colorful, especially those from tropical regions (e.g. Baorisa hieroglyphica). They are characterized by a structure in the metathorax called the nodular sclerite or epaulette, which separates the tympanum and the conjunctiva in the tympanal organ. It functions to keep parasites (Acari) out of the tympanal cavity. Another characteristic in this group is trifine hindwing venation, by reduction or absence of the second medial vein (M2).
Markings present on the wings of noctuid adults can be helpful in distinguishing species. From the basal location to the outer edge (proximal to distal) on the forewing, there is a claviform (club-shaped) stigma, horizontally oriented with the thicker end closer to the wing's outer edge, located posterior to a discal (round) stigma. These are followed distally by a reniform (kidney-shaped) stigma, which is typically oriented with its concave side facing the wing's outer edge. It is often not possible to discern all of the stigmata on all specimens or species. Crossbands or crosslines may be present, oriented longitudinally from the leading to the trailing edge of the wing.