Chloroclysta miata
In 3 days ~10% in a week ~20%
Chloroclysta miata, the autumn green carpet, 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 from most of Europe to the Alatau in Central Asia.
The wingspan is 34–40 mm (1.3–1.6 in). The moth is olive green, with broader forewings. Its crosslines and bands are usually more evenly and extensively whitish. The ground colour of the forewings is olive green or grey green. There is a paler central band and a pale basal area. The crosslines and chevron bands form an intricate pattern. The submarginal line is white. The hindwings are pale grey with a dark discal spot.
The larva is naked, long and thin, bright yellow-green with red-purple lateral stripes. Similar species: Adults are similar in appearance to the red-green carpet (Chloroclysta siterata) but C. siterata has a reddish tinge and darker hindwings.
Adults are on wing from August to November and again (after overwintering as an adult) from April to May. The larva feeds on various deciduous trees and shrubs such as Betula verrucosa, Betula pubescens, Salix species (including Salix caprea and Salix phylicifolia), Populus tremula, Sorbus aucuparia, Amelanchier spicata, Prunus padus, Rhamnus frangula, Vaccinium myrtillus, Vaccinium uliginosum. Larvae can be found from May to August. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cairngorms National Park | 🇬🇧 United Kingdom |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland |
Rare
Under 5% of wildlife watchers report an Autumn Green Carpet sighting in Helsinki on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 602nd most-seen of the 838 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.
September
In that month about 10% of wildlife watchers report an Autumn Green Carpet in Helsinki on a given day, against under 5% in October to August, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Autumn Green Carpet sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Helsinki, in our data
Helsinki is the only city on Wallace's Line with enough records to rate Autumn Green Carpet sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Autumn Green Carpet is recorded against all the insects logged in Helsinki (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.
