Eudonia angustea
In 3 days ~30% in a week ~50%
Eudonia angustea is a moth of the family Crambidae described by John Curtis in 1827. It is found in southern and western Europe, the Canary Islands, Madeira and Turkey. The wingspan is 17–22 mm (0.67–0.87 in). The forewings are narrow, whitish, mixed with brownish and sprinkled with black; base darker; lines whitish, dark-edged, first oblique, second sinuate; orbicular outlined with black; claviform black, touching first line; a black X-shaped discal mark, upper half filled with light brownish; subterminal line cloudy, whitish, hardly touching second. Hindwings are whitish-grey, terminally obscurely darker. The larva is blackish-grey, slightly greenish-tinged; spots darker or almost black; head pale brown; plate of 2 dark brown or almost black.
Adults are on wing from July to late autumn. The larvae feed on mosses on walls and in sand dunes. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Monfragüe National Park | 🇪🇸 Spain | |
| 2 | Cévennes National Park | 🇫🇷 France | |
| 3 | Doñana National Park | 🇪🇸 Spain | |
| 4 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 5 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 6 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Narrow-Winged Grey sighting in London on a given day, based on 192 verified sightings from GBIF citizen-science data. It is the 199th most-seen of the 1504 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
May and September–October
In those months about 20% of wildlife watchers report a Narrow-Winged Grey in London on a given day, against under 5% in July and November–March, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Narrow-Winged Grey sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Among the best
Of the 10 cities where we can rate Narrow-Winged Grey sightings, London ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Porto (Portugal, about 10%) and Rome (Italy, about 10%).
Same genus: Eudonia
The closest relatives of the Narrow-Winged Grey that you can see in London (genus Eudonia) are Small Grey (about 10%) and Little Grey (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Narrow-Winged Grey is recorded against all the insects logged in London (192 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.
