Deltote bankiana
In 3 days ~20% in a week ~30%
Deltote bankiana, the silver barred, is a moth of the family Noctuidae. The species was first described by Johan Christian Fabricius in 1775. It is found in the Palearctic. The range of the species stretches from the Iberian Peninsula and France in the west to Japan and Korea in the east. However, the occurrences are often only isolated. In England, it is found in Cambridgeshire and Kent. Elsewhere in England the species is a regular immigrant. In Ireland it is resident in peat bogs in County Cork and County Kerry. in the north, the range is from South Sweden. In the south, it is absent from Greece. In the Alps, D. bankiana rises to 1500 meters.
The wingspan is 24–28 mm. The length of the forewings is 10–12 mm. "Forewing pale olive brown, sometimes sprinkled with darker brown; the markings shining white, edged with blackish; viz., a small spot at base of costa, two narrow outwardly oblique transverse fasciae, a short costal mark before apex, and a straight subterminal streak; reniform stigma indicated by a swelling in second fascia; hindwing luteous white, sprinkled with grey, deeper terminally. Staudinger describes the form amurula from Amurland as rather smaller... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wadden Sea National Park | 🇩🇪 Germany | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 3 | Fertő-Hanság National Park | 🇭🇺 Hungary |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Warsaw | 🇵🇱 Poland | |
| 3 | Nizhny Novgorod | 🇷🇺 Russia | |
| 4 | Novosibirsk | 🇷🇺 Russia | |
| 5 | Berlin | 🇩🇪 Germany | |
| 6 | Hamburg | 🇩🇪 Germany | |
| 7 | Saint Petersburg | 🇷🇺 Russia | |
| 8 | Moscow | 🇷🇺 Russia | |
| 9 | Munich | 🇩🇪 Germany | |
| 10 | Prague | 🇨🇿 Czechia |
With luck
About 10% of wildlife watchers report a Silver Barred sighting in Helsinki on a given day, based on 22 verified sightings from GBIF citizen-science data. It is the 280th most-seen of the 838 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.
June
In that month about 20% of wildlife watchers report a Silver Barred in Helsinki on a given day, against under 5% in July to May, the lowest months.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Silver Barred sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
Yes
Of the 10 cities where we can rate Silver Barred sightings, Helsinki has the highest daily chance: about 10%. Next come Warsaw (Poland, about 10%) and Nizhny Novgorod (Russia, about 10%).
GBIF citizen-science records
It is estimated from how often the Silver Barred is recorded against all the insects logged in Helsinki (22 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.
