Operophtera fagata
In 3 days ~20% in a week ~30%
Operophtera fagata, the northern winter moth, is a moth of the family Geometridae. It is widespread through much of Europe. This species’ range extends through central and northern Europe to southeast Russia. It is widespread in the UK and Northern Ireland.
In Europe, this species prefers common beech woodland, but will also use birch. The larvae feed on apple (Malus), plum, cherry (Prunus), birch (Betula), lime (Tilia), beech (Fagus). The oval egg is blunt at the micropyle end and has a strongly reticulated surface. It is pale green at first, becoming pale orange.
The larva is initially greenish black with white lines along the body and black or dark brown head. It gradually becomes more yellowish green. The pupa is yellowish brown and larger than in O. brumata. The cremaster comprises a short, stout shaft with long divergent spikes.
The adult male measures up to 33 mm in body length. The forewings are silvery greyish brown with dark brown crossbands. The hindwing is yellowish white. The head and body are pale yellowish brown. The female is smaller and has greatly reduced... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Northern Winter Moth sighting in Moscow on a given day, based on 159 verified sightings from GBIF citizen-science data. It is the 74th most-seen of the 1111 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.
October
In that month about 20% of wildlife watchers report a Northern Winter Moth in Moscow on a given day, against under 5% in December to September, the lowest months.
Yes
Of the 2 cities where we can rate Northern Winter Moth sightings, Moscow has the highest daily chance: about 10%. Next come Helsinki (Finland, under 5%).
GBIF citizen-science records
It is estimated from how often the Northern Winter Moth is recorded against all the insects logged in Moscow (159 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.
