Diaphora mendica
In 3 days ~10% in a week ~30%
Diaphora mendica, the muslin moth, is a moth of the family Erebidae. It is found in the Palearctic realm east to Lake Baikal. The wingspan is 28–38 mm. There is clear sexual dimorphism in the imago, with the male having a brownish grey colour and a forewing length of 14–17 mm, and the female being white and having a forewing length of 17–19 mm. Male sooty brown-grey, usually with a black dot at the apex of the cell; sometimes without and in other cases with a few accessory dots. The female thinly scaled, milky white, with the abdomen of the same colour; wings very sparsely dotted, ab. rustica Hbn. are males with the ground colour milky white like that of the females. ab. binaghii Tur. are transitional specimens from the normal brown males of mendica to rustica. — Schultz names female specimens with only one black dot ab. depuncta. By pairing the white males of rustica with normal females of mendica (which is an interbreeding of races and not hybridisation, as is usually reported) peculiar sand-coloured males result, which are called standfussi. If the female of standfussi is recrossed with the male of rustica a white and much dotted moth results... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Pyrénées National Park | 🇫🇷 France | |
| 3 | Wadden Sea National Park | 🇩🇪 Germany | |
| 4 | Cévennes National Park | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a Muslin Moth sighting in Wadden Sea National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 422nd most-seen of the 818 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.
April and May
In those months about 10% of wildlife watchers report a Muslin Moth in Wadden Sea National Park on a given day, against under 5% in June to March, the lowest months. Those are among Wadden Sea National Park's driest months, with about 45 mm of rain a month against 140 mm in November.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Muslin Moth sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 4
Of the 4 parks where we can rate Muslin Moth sightings, Wadden Sea National Park ranks 3rd at under 5%. The best odds are in Snowdonia National Park (United Kingdom, about 10%) and Pyrénées National Park (France, under 5%).
Same family: Erebidae
The closest relatives of the Muslin Moth that you can see in Wadden Sea National Park (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Cinnabar Moth (about 20%), Brown-Tail Moth (about 20%) and Ruby Tiger Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Muslin Moth is recorded against all the insects logged in Wadden Sea National Park (10 verified sightings from 2019 to 2026), 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.
