Cataclysta lemnata
In 3 days ~20% in a week ~40%
Cataclysta lemnata, the small china-mark, is a moth species of the family Crambidae. It is found in Europe (including Great Britain and Ireland), Morocco and Iran. Adults of the species are sexually dimorphic. The wingspan is 18–19 mm for males and 22–24 mm for females. The forewings are white. The costa, discal spot and a series of terminal spots are all fuscous. The hindwings are white with scattered pale fuscous scales. Meyrick describes it- The forewings in male are whitish, with a yellowish-fuscous discal dot, traces of lines, and a pale brownish terminal streak; in female pale brownish, ochreous-mixed, with a darker discal spot, lines very indistinct, whitish, darker-edged, a whitish siibterminal streak. Hindwings are white; a dark fuscous discal dot; lines outlined with fuscous, sometimes nearly obsolete, first preceded by a yellow or fuscous spot in disc; subterminal and terminal ochreous lines enclosing a black fascia marked with four bluish-silvery dots. The larva is dark green or blackish; dorsal line black; head pale brown. See also Parsons et al.
The moth flies from May to August depending on the location. Larvae are semiaquatic. C. lemnata larvae have been recorded feeding on duckweed species (including Lemna species and Spirodela polyrhiza), as well as water ferns of the genus Azolla. The species is known to pupate in cocoons or shelters built from plant material. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | London | 🇬🇧 United Kingdom | |
| 3 | Amsterdam | 🇳🇱 Netherlands | |
| 4 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 5 | Berlin | 🇩🇪 Germany | |
| 6 | Manchester | 🇬🇧 United Kingdom | |
| 7 | Minsk | 🇧🇾 Belarus | |
| 8 | Birmingham | 🇬🇧 United Kingdom | |
| 9 | Munich | 🇩🇪 Germany | |
| 10 | Warsaw | 🇵🇱 Poland |
With luck
About 10% of wildlife watchers report a Small China-Mark sighting in Amsterdam on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 120th most-seen of the 234 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
June to September
In those months about 10% of wildlife watchers report a Small China-Mark in Amsterdam on a given day, against under 5% in October to May, the lowest months.
Between 5 and 8 pm
Across all the parks we cover, that three-hour window holds the most Small China-Mark sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Among the best
Of the 18 cities where we can rate Small China-Mark sightings, Amsterdam ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Liverpool (United Kingdom, about 10%) and London (United Kingdom, about 10%).
Same family: Crambidae
The closest relatives of the Small China-Mark that you can see in Amsterdam (family Crambidae, Crambid Snout Moths) are Box Tree Moth (about 10%), Mint Moth (about 10%) and Small Magpie (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Small China-Mark is recorded against all the insects logged in Amsterdam (9 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.
