Lythria purpuraria
In 3 days ~50% in a week ~80%
Lythria purpuraria, the purple-barred yellow, is a species of moth of the family Geometridae. It is found from western Europe to Siberia, Russia, Ukraine, Turkmenistan and Kazakhstan. Lythria purpuraria generally have two red-purple transverse lines in their green-yellow forewings. They are often confused with L. cruentaria, a sister species in the same family. This is because they are both available in a variety of sizes with multiple wing patterns. L. purpuraria and the other four species within the Lythria family have a very difficult genitalia structure, which is complicated to analyze and study.
Adults are on wing from April to June and again from July to September. It is a day-flying species. There are two generations per year. The larvae feed on prostrate knotweed, also known as Polygonum aviculare. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hortobágy National Park | 🇭🇺 Hungary | |
| 2 | Pyrénées National Park | 🇫🇷 France | |
| 3 | Cévennes National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kharkiv | 🇺🇦 Ukraine | |
| 2 | Bishkek | 🇰🇬 Kyrgyzstan | |
| 3 | Astana | 🇰🇿 Kazakhstan | |
| 4 | Bucharest | 🇷🇴 Romania | |
| 5 | Rostov-on-Don | 🇷🇺 Russia | |
| 6 | Novosibirsk | 🇷🇺 Russia | |
| 7 | Kyiv | 🇺🇦 Ukraine | |
| 8 | Prague | 🇨🇿 Czechia | |
| 9 | Budapest | 🇭🇺 Hungary | |
| 10 | Vienna | 🇦🇹 Austria |
Possible
About 20% of wildlife watchers report a Purple-Barred Yellow sighting in Hortobágy National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 19th most-seen of the 22 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
July
In that month about 40% of wildlife watchers report a Purple-Barred Yellow in Hortobágy National Park on a given day, against under 5% in March–April, June and August–October, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Purple-Barred Yellow sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Yes
Of the 3 parks where we can rate Purple-Barred Yellow sightings, Hortobágy National Park has the highest daily chance: about 20%. Next come Pyrénées National Park (France, under 5%) and Cévennes National Park (France, under 5%).
Same order: Lepidoptera
The closest relatives of the Purple-Barred Yellow that you can see in Hortobágy National Park (order Lepidoptera, Butterflies and Moths) are Large Copper (about 30%), Lesser Fiery Copper (about 30%) and Southern Festoon (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Purple-Barred Yellow is recorded against all the insects logged in Hortobágy National Park (5 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.
