Bug FAQDimorphic Snout
Hypena bijugalis · Order: Lepidoptera · Family: Erebidae
Also called: Dimorphic Bomolocha Moth, Dimorphic Hypena
The dimorphic snout moth has a wingspan of about 24 to 31 mm. It lives across most of North America, from Nova Scotia to Vancouver Island and south through the United States to Florida. Adults fly from April to September, with two generations in much of the east and more generations farther south.
Source: Wikipedia
How to recognize it
It is called the dimorphic snout, dimorphic bomolocha, or toothed snout-moth and belongs to the family Erebidae.
Source: Wikipedia
Size
Wingspan ranges from 24 to 31 mm.
Source: Wikipedia
Where it lives
Found throughout Canada and the United States, from the Atlantic coast to the Pacific Northwest and down to Florida.
Source: Wikipedia
What it eats
Caterpillars feed on silky dogwood (Cornus sericea) and possibly other Cornus species.
Source: Wikipedia
Life cycle
Adults are on the wing from April through September, with two generations in much of the east and additional generations farther south.
Source: Wikipedia
When you see it
Flight period extends from April to September depending on location.
Source: Wikipedia
Where it comes from
Native to North America, spanning Nova Scotia, southern Canada, and the United States to Florida.
Source: Wikipedia
Where it is found in the US
Recorded in 39 of 51 states and DC. Most records: Ohio, New York, Alabama, Texas, Oregon, Michigan, Virginia, Oklahoma.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada; native in United States. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
When are dimorphic snout moths active?
Adults fly from April to September, varying by region.
Source: Wikipedia
What do the larvae eat?
The caterpillars feed on silky dogwood and may use other dogwood species as food.
Source: Wikipedia
Same family (Erebidae)
Spongy MothLymantria disparDamages trees, gardens or crops
Fall Webworm MothHyphantria cuneaDamages trees, gardens or crops
Brown-tail MothEuproctis chrysorrhoeaCan irritate skin
Isabella Tiger MothPyrrharctia isabella
Virginian Tiger MothSpilosoma virginicaCan irritate skin
Salt Marsh MothEstigmene acreaSources
- Wikipedia: https://en.wikipedia.org/wiki/Hypena_bijugalis
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.