Bug FAQDouble-lined Prominent
Lochmaeus bilineata · Order: Lepidoptera · Family: Notodontidae
Also called: Double-lined Prominent Moth
Source: Wikipedia
Adults have forewings that are grey to brownish-grey and a wingspan of about 32 to 40 mm.
Source: Wikipedia
How to recognize it
The forewings are grey to brownish-grey.
Source: Wikipedia
Size
The wingspan ranges from 32 to 40 mm.
Source: Wikipedia
What it eats
The larvae feed on species of beech, oak, basswood, birch and elm.
Source: Wikipedia
Life cycle
Adults are on the wing from April to October in the southern part of the range and from June to August in the northern part.
Source: Wikipedia
When you see it
Flight period is April-October in the south and June-August in the north.
Source: Wikipedia
Where it comes from
Its native range includes the eastern United States and southern Canada, extending west to New Mexico and north to Saskatchewan.
Source: Wikipedia
Where it is found in the US
Recorded in 39 of 51 states and DC. Most records: Texas, Alabama, Oklahoma, Ohio, Tennessee, North Carolina, Michigan, Georgia.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in United States; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
What do the caterpillars eat?
They feed on beech, oak, basswood, birch and elm trees.
Source: Wikipedia
Same family (Notodontidae)
White-dotted ProminentNadata gibbosaDamages trees, gardens or crops
Buff-tipPhalera bucephalaDamages trees, gardens or crops
Common Gluphisia MothGluphisia septentrionis
Pine Processionary-mothThaumetopoea pityocampaDamages trees, gardens or crops
Walnut Caterpillar MothDatana integerrimaDamages trees, gardens or crops
Unicorn ProminentCoelodasys unicornisDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Lochmaeus_bilineata
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-23.