Helcystogramma rufescens
In 3 days ~10% in a week ~20%
Helcystogramma rufescens is a moth of the family Gelechiidae. It is found in most of Europe. The wingspan is 14–17 mm. Forewings with termen straight; light reddish-ochreous, sometimes darker between veins posteriorly; second, discal stigma sometimes fuscous. Hindwings are whitish-grey, tinged with reddish-ochreous. The larva is white; subdorsal line and lateral series of oblique marks dark grey; dots black; 3-6 black, 3 and 4 white-edged anteriorly, 6 with brown dorsal blotch; head and plate of 2 black.
Adults are on wing from June to August. The larvae feed on various grasses, including Brachypodium sylvaticum, Arrhenatherum elatius, Poa trivialis, Dactylis glomerata, Phalaris arundinacea, Melica nutans, Calamagrostis arundinacea and Calamagrostis epigejos. Larvae can be found from April to July. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Orange Crest sighting in London on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 1005th most-seen of the 1504 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Orange Crest in London on a given day, so our monthly data shows no clear season.
Yes
Of the 2 cities where we can rate Orange Crest sightings, London has the highest daily chance: under 5%. Next come Moscow (Russia, under 5%).
Same family: Gelechiidae
The closest relatives of the Orange Crest that you can see in London (family Gelechiidae, Twirler Moths) are Ash-Coloured Crest (about 10%), Dark Groundling (about 10%) and Cinerous Neb (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Orange Crest is recorded against all the insects logged in London (12 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.
