Dark-triangle Button
Common NameDark-triangle Button
Scientific NameAcleris nigrilineana
FamilyTortricidae
SubfamilyTortricinae
Wingspan (mm)14.5
Wing Patterncryptic
Primary Colorsbrown, tan, dark brown
HabitatDeciduous forests, woodlands, oak savannas
Geographic RangeEastern and Central North America (from Quebec and Ontario south to Florida and west to Texas and Manitoba)
Host PlantsQuercus (oak) species
Flight PeriodAugust to November
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesLarvae are leaf-rollers on oak host plants. Pupation occurs within the rolled leaf, and adults emerge in late summer and fall, typically having one generation per year.
Identification TipsLook for the small size, the overall mottled brown and tan coloration, and especially the distinctive dark triangular patch on the costa of the forewing.
Description
A small moth with mottled light brown and dark brown forewings, characterized by a prominent dark triangular patch along the leading edge (costa) and a lighter, often tan, central area.
