Epirrita autumnata
In 3 days ~10% in a week ~20%
The autumnal moth (Epirrita autumnata) is a moth of the family Geometridae. The species was first described by Moritz Balthasar Borkhausen in 1794. It is found throughout the Palearctic region and the Near East and has a much wider distribution than its two close relatives (see below). In Sápmi (Lapland), in some years, the numerous autumnal moth larvae defoliate square miles of birch forests on mountains. 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 Autumnal Moth sighting in Seattle on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 332nd most-seen of the 428 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.
November
In that month about 10% of wildlife watchers report an Autumnal Moth in Seattle on a given day, against under 5% in December to October, the lowest months. That is one of Seattle's wettest months, with about 190 mm of rain against 20 mm in July.
3rd of 4
Of the 4 cities where we can rate Autumnal Moth sightings, Seattle ranks 3rd at under 5%. The best odds are in Helsinki (Finland, about 10%) and Moscow (Russia, under 5%).
Same family: Geometridae
The closest relatives of the Autumnal Moth that you can see in Seattle (family Geometridae, Geometer Moths) are Tissue Moth (about 10%), Omnivorous Looper (about 10%) and Small Dusty Wave (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Autumnal Moth is recorded against all the insects logged in Seattle (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.
