Thallarcha macilenta
In 3 days ~20% in a week ~30%
Thallarcha macilenta is a moth in the subfamily Arctiinae. It was described by Thomas Pennington Lucas in 1894. It is found in Australia, where it has been recorded from New South Wales and Queensland. The wingspan is about 20 mm. The forewings are white with black zigzag markings. The hindwings are also white. 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 a Thallarcha macilenta sighting in Blue Mountains National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 409th 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 30%, if each day is a fresh chance.
January–February, September and November
In those months about 10% of wildlife watchers report a Thallarcha macilenta in Blue Mountains National Park on a given day, against under 5% in March–August, October and December, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Thallarcha macilenta sightings with a recorded time, and nearly all 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 Thallarcha macilenta sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Thallarcha
The closest relatives of the Thallarcha macilenta that you can see in Blue Mountains National Park (genus Thallarcha) are Thallarcha phalarota (about 10%) and Thallarcha albicollis (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Thallarcha macilenta is recorded against all the insects logged in Blue Mountains National Park (10 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.
