Cabera pusaria
In 3 days ~20% in a week ~30%
The common white wave (Cabera pusaria) is a moth of the family Geometridae. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. It is found throughout the Palearctic region. Their habitat is deciduous forests and their surroundings.
This species has white wings, sometimes tinged with pink, slight grey dusted grey and with fine grey fascia (the first curved) on the forewing and two on the hindwing. ab. heveraria H.-Schiff. is a rare form in which the grey dusting densely covers almost the entire wings. ab. rotundaria Haw. is a rounder-winged form with the first lines strongly approximated and said to be the product of under-feeding the larvae. Hybrid fletcheri Tutt (pusaria male x exanthemata female) is just intermediate between the parent forms, rather pure white, the lines tinged with ochreous. The wingspan is 32–35 mm.
One or two broods are produced each year and the adults can be seen at any time from May to August.[1] This moth flies at night and is attracted to light. The larva is elongate, with a rather flattened head is very variable -green with purplish brown or blackish dorsal spots sometimes vague, purplish-brown... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 2 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 3 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 4 | Wadden Sea National Park | 🇩🇪 Germany | |
| 5 | Cévennes National Park | 🇫🇷 France | |
| 6 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Porto | 🇵🇹 Portugal | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | Manchester | 🇬🇧 United Kingdom | |
| 5 | London | 🇬🇧 United Kingdom | |
| 6 | Helsinki | 🇫🇮 Finland | |
| 7 | Essen | 🇩🇪 Germany | |
| 8 | Berlin | 🇩🇪 Germany | |
| 9 | Moscow | 🇷🇺 Russia | |
| 10 | Saint Petersburg | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Common White Wave sighting in Porto on a given day, based on 26 verified sightings from GBIF citizen-science data. It is the 214th 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 30%, if each day is a fresh chance.
March–May, July, September and November
In those months about 10% of wildlife watchers report a Common White Wave in Porto on a given day, against under 5% in June, August, October and December–February, the lowest months.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Common White Wave sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 10 cities where we can rate Common White Wave sightings, Porto ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Liverpool (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Common White Wave is recorded against all the insects logged in Porto (26 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.
