Bug FAQNarrow-winged Grey
Eudonia angustea · Order: Lepidoptera · Family: Crambidae
The narrow-winged grey moth has a wingspan of about 17 to 22 mm and narrow, whitish forewings with brownish and black speckles, plus distinctive black markings. Its larvae feed on mosses found on walls and in sand dunes, and adults are active from July through late autumn.
Source: Wikipedia
How to recognize it
Forewings are narrow, whitish mixed with brownish, sprinkled with black; they have a dark base, whitish dark-edged lines, a black orbicular outline, a black claviform touching the first line, and a black X-shaped discal mark partly filled with light brown. Hindwings are whitish-grey and become slightly darker toward the edge.
Source: Wikipedia
Size
The moth’s wingspan ranges from 17 to 22 mm (0.67 to 0.87 in).
Source: Wikipedia
Where it lives
Larvae live on mosses that grow on walls and in sand dunes.
Source: Wikipedia
What it eats
The caterpillars feed on mosses found on walls and in sand dunes.
Source: Wikipedia
Life cycle
Adults are on the wing from July until late autumn.
Source: Wikipedia
When you see it
The flight period extends from July through late autumn.
Source: Wikipedia
More photos
Same family (Crambidae)
Box Tree MothCydalima perspectalisDamages trees, gardens or crops
Celery Leaftier MothUdea rubigalisDamages trees, gardens or crops
Elegant Grass-veneerMicrocrambus elegans
Hawaiian Beet Webworm MothSpoladea recurvalisDamages trees, gardens or crops
Garden Grass-veneerChrysoteuchia culmellaDamages trees, gardens or crops
Bluegrass Webworm MothParapediasia teterrellusDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Eudonia_angustea
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.