Lythria purpuraria
In 3 days ~40% in a week ~70%
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 Bishkek on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 17th most-seen of the 19 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
April
In that month about 40% of wildlife watchers report a Purple-Barred Yellow in Bishkek on a given day, against under 5% in June and August–March, the lowest months. That is one of Bishkek's wettest months, with about 60 mm of rain against 15 mm in August.
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.
Among the best
Of the 13 cities where we can rate Purple-Barred Yellow sightings, Bishkek ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Kharkiv (Ukraine, about 20%).
Same order: Lepidoptera
The closest relatives of the Purple-Barred Yellow that you can see in Bishkek (order Lepidoptera, Butterflies and Moths) are Small White (about 30%), Eurasian Hummingbird Hawkmoth (about 20%) and Lesser Fiery Copper (about 20%), 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 Bishkek (5 verified sightings), 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.
