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 Vancouver on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 350th most-seen of the 482 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.
October
In that month about 10% of wildlife watchers report an Autumnal Moth in Vancouver on a given day, against under 5% in November to September, the lowest months.
4th of 4
Of the 4 cities where we can rate Autumnal Moth sightings, Vancouver ranks 4th at under 5%. The best odds are in Helsinki (Finland, about 10%), Moscow (Russia, under 5%) and Seattle (United States, under 5%).
Same family: Geometridae
The closest relatives of the Autumnal Moth that you can see in Vancouver (family Geometridae, Geometer Moths) are Hemlock Looper Moth (about 10%) and Phantom Hemlock Looper (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 Vancouver (8 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.
