Mournful Duskywing
Common NameMournful Duskywing
Scientific NameErynnis tristis
FamilyHesperiidae
SubfamilyPyrginae
Wingspan (mm)38
Wing Patternspotted
Primary Colorsdark brown, black, white
HabitatOpen woodlands, chaparral, riparian areas, gardens, disturbed areas
Geographic RangeSouthwestern United States (California, Arizona, New Mexico, Texas), Mexico, Central America, and into South America
Host PlantsQuercus species (oaks)
Flight PeriodMarch to November (multiple broods)
Flight Styledarting
Conservation Statusleast-concern
Lifecycle NotesEggs are laid singly on oak leaves. Larvae feed on the leaves, creating shelters by folding or tying leaves together. Pupation occurs within a leaf shelter or on the ground, with multiple generations per year.
Identification TipsThe most reliable identification feature is the prominent, unbroken white fringe on the hindwings. Other duskywings may have a partial or less distinct white fringe, or lack it entirely. The forewing spots are also present but can be variable.
Description
A medium-sized, dark brown skipper with a distinctive bright white fringe along the outer margin of the hindwings and scattered small white spots on the forewings.
