Elachista argentella
In 3 days ~10% in a week ~20%
Elachista argentella is a moth of the family Elachistidae found in all of Europe, except the Balkan Peninsula. The wingspan is 11–12 millimetres (0.43–0.47 in). The head is white. Forewings are white, sometimes ochreous- tinged. Hindwings in male grey in female grey-whitish. The larva is greenish-grey; dorsal line whitish;head pale brown.
The moth flies from May to July depending on the location. The larvae feed on a number of different species of grass including Agrostis, Avenula pratensis, Avenula pubescens, Brachypodium pinnatum, Brachypodium sylvaticum, Bromus erectus, Bromus sterilis, Calamagrostis epigejos, Dactylis glomerata, Deschampsia cespitosa, Elymus hispidus, Elymus repens, Festuca ovina, Festuca rubra, Festuca trachyphylla, Festuca valesiaca, Holcus lanatus, Holcus mollis, Koeleria glauca, Koeleria grandis, Koeleria macrantha, Leymus arenarius, Phalaris arundinacea, Phleum and Poa pratensis. They mine the leaves of their host plant. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom | |
| 2 | Birmingham | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report a Swan-Feather Dwarf sighting in Birmingham on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 668th most-seen of the 811 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
May
In that month about 10% of wildlife watchers report a Swan-Feather Dwarf in Birmingham on a given day, against under 5% in June to April, the lowest months.
Among the best
Of the 2 cities where we can rate Swan-Feather Dwarf sightings, Birmingham ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in London (United Kingdom, under 5%).
Same order: Lepidoptera
The closest relatives of the Swan-Feather Dwarf that you can see in Birmingham (order Lepidoptera, Butterflies and Moths) are Speckled Wood (about 50%), European Comma (about 30%) and Gatekeeper (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Swan-Feather Dwarf is recorded against all the insects logged in Birmingham (6 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.
