Imma acosma
In 3 days ~10% in a week ~30%
Imma acosma is a moth in the family Immidae. It was described by Alfred Jefferis Turner in 1900. It is found in Australia, where it has been recorded from Queensland and New South Wales. The wingspan is 16–17 mm. The forewings are brownish-fuscous, with the posterior portion of the disc sometimes suffused with brownish-ochreous and sometimes with a small fuscous erect line on the inner margin at one-fifth. A very irregularly angled fuscous line runs from the costa before the middle to the inner margin beyond the middle and there is a fuscous dot in the disc at two-thirds, followed by two oblique fuscous lines from the costa at three-fifths and four-fifths towards, but not reaching, the anal angle and hindmargin respectively. All these markings may be obsolete. Sometimes, there is a dark fuscous line close to the upper three-fourths of the hindmargin. The hindwings are fuscous-grey. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Blue Mountains National Park | 🇦🇺 Australia |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report an Imma acosma sighting in Blue Mountains National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 456th most-seen of the 789 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
February–April and October
In those months about 10% of wildlife watchers report an Imma acosma in Blue Mountains National Park on a given day, against under 5% in May–September and November–January, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Imma acosma sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Blue Mountains National Park, in our data
Blue Mountains National Park is the only park on Wallace's Line with enough records to rate Imma acosma sightings: about 10% of wildlife watchers there report one on a given day.
Same order: Lepidoptera
The closest relatives of the Imma acosma that you can see in Blue Mountains National Park (order Lepidoptera, Butterflies and Moths) are Swordgrass Brown (about 40%), Common Brown (about 30%) and Australian Painted Lady (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Imma acosma is recorded against all the insects logged in Blue Mountains National Park (8 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.
