Achyra affinitalis
In 3 days ~20% in a week ~40%
Achyra affinitalis, the cotton web spinner, is a moth of the family Crambidae. It was first described by Julius Lederer in 1863. This species is found in Australia and New Zealand. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hattah-Kulkyne National Park | 🇦🇺 Australia | |
| 2 | Blue Mountains National Park | 🇦🇺 Australia | |
| 3 | Great Otway National Park | 🇦🇺 Australia |
With luck
About 10% of wildlife watchers report a Cotton Web Spinner sighting in Blue Mountains National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 181st most-seen of the 789 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
September–October and December–April
In those months about 10% of wildlife watchers report a Cotton Web Spinner in Blue Mountains National Park on a given day, against under 5% in May–August and November, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Cotton Web Spinner sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 3 parks where we can rate Cotton Web Spinner sightings, Blue Mountains National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Hattah-Kulkyne National Park (Australia, about 10%).
Same family: Crambidae
The closest relatives of the Cotton Web Spinner that you can see in Blue Mountains National Park (family Crambidae, Crambid Snout Moths) are Nacoleia rhoeoalis (about 10%), Eudonia aphrodes (about 10%) and Lesser Rice-Leafroller (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cotton Web Spinner is recorded against all the insects logged in Blue Mountains National Park (23 verified sightings from 2019 to 2026), 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.
