Phigalia titea
In 3 days ~20% in a week ~30%
Phigalia titea, the spiny looper or half-wing moth, is a species of moth in the family Geometridae. The species was first described by Pieter Cramer in 1780 (some sources give 1782). The average wingspan is about 34 mm. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | Boston | 🇺🇸 United States | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Washington | 🇺🇸 United States | |
| 5 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 6 | Denver | 🇺🇸 United States | |
| 7 | Montreal | 🇨🇦 Canada | |
| 8 | San Antonio | 🇺🇸 United States | |
| 9 | New York City | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Half-Wing Moth sighting in Shenandoah National Park on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 406th most-seen of the 723 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
March
In that month about 30% of wildlife watchers report a Half-Wing Moth in Shenandoah National Park on a given day, against under 5% in April to February, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Half-Wing Moth sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Shenandoah National Park, in our data
Shenandoah National Park is the only park on Wallace's Line with enough records to rate Half-Wing Moth sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Half-Wing Moth is recorded against all the insects logged in Shenandoah National Park (13 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
