Acleris laterana
In 3 days ~10% in a week ~20%
Acleris laterana is a moth of the family Tortricidae. It is native to the Palearctic realm, but has been accidentally imported into the United States. The wingspan is about 15–20 mm.The forewings are oblong, pale reddish-brown, fuscous, or dark fuscous, darker-strigulated; tufts slight, a larger one in middle of disc; edge of basal patch darker dorsally; a large triangular red-brown or blackish-fuscous blotch on costa, anterior edge deep red-brown, sometimes with extension of central fascia to dorsum. Hindwings pale grey.The larva is green whitish; dorsal line green; head and plate of 2 pale brown. It is quite variable, but the forewing almost always has a rather broad, reddish, triangular to trapezoidal spot at the leading edge.
The species can be difficult to distinguish from Acleris comariana A genitalic preparation must be examined to determine the two species. In Europe, adults are on wing from June to July and again from August to September.
The larvae feed on Crataegus, Filipendula ulmaria, Populus, Prunus, Rosa, Rubus, Sorbus, Salix, Symphytum officinale and Vaccinium. The larvae can be found from May to June. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saint Petersburg | 🇷🇺 Russia | |
| 2 | Moscow | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report a Dark-Triangle Button sighting in Saint Petersburg on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 377th most-seen of the 448 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 a Dark-Triangle Button in Saint Petersburg on a given day, against under 5% in October to August, the lowest months.
Yes
Of the 2 cities where we can rate Dark-Triangle Button sightings, Saint Petersburg has the highest daily chance: under 5%. Next come Moscow (Russia, under 5%).
GBIF citizen-science records
It is estimated from how often the Dark-Triangle Button is recorded against all the insects logged in Saint Petersburg (5 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.
