Pero radiosaria

Pero radiosaria · Order: Lepidoptera · Family: Geometridae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Pero radiosaria
Photo: Sue Carnahan, CC BY

The adult Pero radiosaria has a wingspan ranging from about 28 to 36 millimetres. Its caterpillars feed on the plant Clematis drummondii. Adults have been observed on the wing throughout the entire year.

Source: Wikipedia

Size

Wingspan measures roughly 28 to 36 mm.

Source: Wikipedia

What it eats

Larvae eat the leaves of Clematis drummondii.

Source: Wikipedia

When you see it

Adults can be seen flying at any time of year.

Source: Wikipedia

Where it is found in the US

Recorded in 7 of 51 states and DC. Most records: California, Arizona, Texas, New Mexico, Maryland, North Carolina, South Carolina.

Darker = more records. Counts are museum and citizen-science records, not population size.

Source: GBIF

Months it is reported in the US

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Source: GBIF

More photos

Pero radiosaria photo 2
Photo: Sue Carnahan, CC BY
Pero radiosaria photo 3
Photo: Bren Zo, CC BY
Pero radiosaria photo 4
Photo: Sam Kieschnick, CC BY
Pero radiosaria photo 5
Photo: Rosario Douglas, CC BY

Same family (Geometridae)

Willow BeautyWillow BeautyPeribatodes rhomboidariaPale BeautyPale BeautyCampaea perlataLarge Lace-border MothLarge Lace-border MothScopula limboundataDamages trees, gardens or cropsSouthern Pine and Cypress AnglesSouthern Pine and Cypress AnglesMacaria bicolorataRiband WaveRiband WaveIdaea aversataYellow Shell MothYellow Shell MothCamptogramma bilineata

Sources

  • Wikipedia: https://en.wikipedia.org/wiki/Pero_radiosaria

Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia

Text written 2026-10-25 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-25.

How this page works

This is one bug's fact sheet. The colored box at the top says whether it is dangerous. Sections below cover how to recognize it, whether it is a pest, and how to deal with it. The US map shows which states have records; tap a state to see other bugs there.

Every fact on Bug FAQ comes from a named source (university extension sites, government agencies, GBIF, iNaturalist, Wikipedia). The source is linked next to each section. If we have no source for something, we leave it out.