Bug FAQMaple Callus Borer Moth
Synanthedon acerni · Order: Lepidoptera · Family: Sesiidae
Also called: Maple Callus Borer
Source: Wikipedia
Adults have a wingspan of about 18 to 25 mm.
Source: Wikipedia
How to recognize it
Synanthedon acerni, known as the maple callus borer, belongs to the clearwing moth family Sesiidae.
Source: Wikipedia
Size
The species measures 18 to 25 mm across the wings.
Source: Wikipedia
Where it lives
It lives in eastern Canada and the eastern United States.
Source: Wikipedia
What it eats
The caterpillars feed on maple (Acer) species.
Source: Wikipedia
Life cycle
Adults fly from June through July, and start appearing as early as April in the United States.
Source: Wikipedia
When you see it
Moths are active during the summer months, with earlier activity in the U.S. starting in April.
Source: Wikipedia
Where it is found in the US
Recorded in 37 of 51 states and DC. Most records: Massachusetts, Vermont, Michigan, Mississippi, Connecticut, Ohio, New York, Alabama.
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
Same family (Sesiidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Synanthedon_acerni
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-23.