Idaea ochrata
In 3 days ~10% in a week ~20%
Idaea ochrata, the bright wave, is a moth of the family Geometridae. It is found in Europe. The species has a wingspan of 21–24 mm. The adults fly at night from late June to early August in one generation [1]. The species overwinters as a larva.
The larvae feed on the flowers of hawk's beard (Crepis sp.), dandelion (Taraxacum) and coltsfoot (Tussaligo) in captivity. In the wild the larvae feed on Smooth Tare and the flowers of Hare's-foot Clover. ^The flight season refers to the British Isles. This may vary in other parts of the range. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 2 | Cévennes National Park | 🇫🇷 France | |
| 3 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 4 | Pyrénées National Park | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a Bright Wave sighting in Lisbon on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 361st most-seen of the 441 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 Bright Wave in Lisbon on a given day, against under 5% in June to April, the lowest months.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Bright Wave sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
8th of 8
Of the 8 cities where we can rate Bright Wave sightings, Lisbon ranks 8th at under 5%. The best odds are in Kharkiv (Ukraine, about 10%), Prague (Czechia, about 10%) and Madrid (Spain, about 10%).
GBIF citizen-science records
It is estimated from how often the Bright Wave is recorded against all the insects logged in Lisbon (7 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.
