Bug FAQYellow Slant-line
Tetracis crocallata · Order: Lepidoptera · Family: Geometridae
Also called: Yellow Slant-line Moth
The Yellow Slant-line moth has forewings 17 to 25 mm long and belongs to the Geometridae family. Adults fly from May through August, with two generations in the southern part of its range.
Source: Wikipedia
Size
Forewing length ranges from 17 to 25 mm.
Source: Wikipedia
Where it lives
It occurs across North America from eastern Canada down to northern Florida and west to the central United States.
Source: Wikipedia
What it eats
Caterpillars feed on alder, chestnut and willow species.
Source: Wikipedia
Life cycle
Adults are on the wing from May to August, producing two generations in New York and farther south.
Source: Wikipedia
When you see it
Moths are active during the warm months of May through August.
Source: Wikipedia
Where it comes from
Its native range includes much of Canada and the United States, from Nova Scotia and Manitoba to Texas and Florida.
Source: Wikipedia
Lookalikes
It can be confused with the White Slant-line moth (Tetracis cachexiata) or the Confused Eusarca moth (Eusarca confusaria).
Source: Wikipedia
Where it is found in the US
Recorded in 35 of 51 states and DC. Most records: Pennsylvania, Ohio, New York, Massachusetts, Vermont, Michigan, Minnesota, Virginia.
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
When can I see adult Yellow Slant-line moths?
Adults are flying from May to August, depending on where you live.
Source: Wikipedia
Where is this moth found?
It lives across much of Canada and the United States, from the Atlantic coast to the central plains.
Source: Wikipedia
How big is the Yellow Slant-line moth?
Its forewings measure between 17 and 25 mm in length.
Source: Wikipedia
Same family (Geometridae)
Willow BeautyPeribatodes rhomboidaria
Pale BeautyCampaea perlataDamages trees, gardens or crops
Large Lace-border MothScopula limboundataDamages trees, gardens or crops
Riband WaveIdaea aversata
Yellow Shell MothCamptogramma bilineata
Large Maple Spanworm MothProchoerodes lineolaDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Tetracis_crocallata
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.