Least Rivula
Common NameLeast Rivula
Scientific NameRivula basalis
FamilyErebidae
SubfamilyRivulinae
Wingspan (mm)20
Wing Patternstriped
Primary Colorsbrown, dark brown, tan
HabitatGrasslands, meadows, open woodlands, fields, suburban areas
Geographic RangeEastern North America (from Canada south to Florida and west to Texas)
Host Plantsgrasses
Flight PeriodMay to October
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesLarvae feed on various grasses and are known to overwinter. The species typically has multiple broods per year.
Identification TipsKey identification features include the small size and the distinctive, sharply delineated dark brown basal patch on the forewings, contrasting with the lighter outer wing.
Description
A small moth with light brown or tan forewings, characterized by a prominent, irregular dark brown band across the basal half.
