Elachista argentella
In 3 days ~10% in a week ~30%
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 London on a given day, based on 29 verified sightings from GBIF citizen-science data. It is the 616th most-seen of the 1504 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May
In that month about 10% of wildlife watchers report a Swan-Feather Dwarf in London on a given day, against under 5% in June to April, the lowest months.
Yes
Of the 2 cities where we can rate Swan-Feather Dwarf sightings, London has the highest daily chance: under 5%. Next come Birmingham (United Kingdom, under 5%).
Same order: Lepidoptera
The closest relatives of the Swan-Feather Dwarf that you can see in London (order Lepidoptera, Butterflies and Moths) are Jersey Tiger (about 40%), Speckled Wood (about 40%) and Red Admiral (about 40%), 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 London (29 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.
