Carcina quercana
In 3 days ~20% in a week ~40%
Carcina quercana is a species of moth of the family Depressariidae. It is found in Europe. It has been introduced recently in North America, British Columbia and western Washington. It is occasionally known by several common names including oak lantern, long-horned flat-body, and oak-skeletonizer moth (the last most common in North America).
The wingspan is 16–20 mm. The forewings are light ochreous, more or less purple-tinged, sprinkled with dark fuscous; costal edge purple; a yellow blotch along costa near base, and another beyond middle; a fuscous transverse line at 1/4, followed by a yellowish suffusion towards dorsum; stigmata dark grey, plical usually faint; a terminal purple line; cilia bright yellow except on tornus. Hindwings are yellow-whitish, apex rosy-tinged. The larva is pale green; dorsal line darker, paler -edged; head yellowish-green,
The larvae feed on various deciduous trees, including oak and beech. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany | |
| 3 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 4 | Cévennes National Park | 🇫🇷 France | |
| 5 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | London | 🇬🇧 United Kingdom | |
| 3 | Porto | 🇵🇹 Portugal | |
| 4 | Manchester | 🇬🇧 United Kingdom | |
| 5 | Birmingham | 🇬🇧 United Kingdom | |
| 6 | Copenhagen | 🇩🇰 Denmark | |
| 7 | Hamburg | 🇩🇪 Germany | |
| 8 | Prague | 🇨🇿 Czechia | |
| 9 | Paris | 🇫🇷 France | |
| 10 | Berlin | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report an Oak Lantern sighting in Porto on a given day, based on 44 verified sightings from GBIF citizen-science data. It is the 149th most-seen of the 498 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.
August
In that month about 20% of wildlife watchers report an Oak Lantern in Porto on a given day, against under 5% in July and November–May, the lowest months. That is one of Porto's driest months, with about 20 mm of rain against 140 mm in January.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Oak Lantern sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
3rd of 13
Of the 13 cities where we can rate Oak Lantern sightings, Porto ranks 3rd at about 10%. The best odds are in Liverpool (United Kingdom, about 20%) and London (United Kingdom, about 10%).
Same order: Lepidoptera
The closest relatives of the Oak Lantern that you can see in Porto (order Lepidoptera, Butterflies and Moths) are Speckled Wood (about 30%), Red Admiral (about 20%) and Double-Striped Pug (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Oak Lantern is recorded against all the insects logged in Porto (44 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.
