Cauchas rufimitrella
In 3 days ~10% in a week ~20%
Cauchas rufimitrella is a diurnal lepidopteran from the family Adelidae, the fairy long horn moths. It is found in almost all of Europe, except Portugal, Ukraine and the southern part of the Balkan Peninsula. The wingspan of the moth ranges from 10 to 12 millimeters. The thick erect hairs on the head vertex are black, more or less ferruginous-mixed above. Antennae in male 2 [2x the length of the wing], in female 1.5, black, tip whitish. The forewings are shining brassy bronze, sometimes partly or wholly coppery or metallic red purple. The hindwings are dark purplish fuscous.
The flight time is May to June. Caterpillars live on the seeds of Cardamine pratensis and then they pupate over the winter. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 2 | Pyrénées National Park | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a Meadow Longhorn sighting in London on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 931st 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 20%, if each day is a fresh chance.
May
In that month about 10% of wildlife watchers report a Meadow Longhorn in London on a given day, against under 5% in June to April, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Meadow Longhorn sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 7 cities where we can rate Meadow Longhorn sightings, London ranks 5th at under 5%, level with the leaders once rounded. The best odds are in Munich (Germany, under 5%), Paris (France, under 5%) and Birmingham (United Kingdom, under 5%).
Same family: Adelidae
The closest relatives of the Meadow Longhorn that you can see in London (family Adelidae, Fairy Moths) are Adela viridella (about 10%) and Yellow-Barred Longhorn (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Meadow Longhorn is recorded against all the insects logged in London (14 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.
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