Milionia basalis
In 3 days ~20% in a week ~50%
Milionia basalis is a moth of the family Geometridae first described by Francis Walker in 1854. It is found in Japan, the north-eastern parts of the Himalayas, Myanmar and Sundaland. The wingspan is 50–56 mm. The larvae feed on Dacrydium and Podocarpus species. The adult is day flying. It feed on the nectar flowers of Leptospermum flavescens in the mountains of Peninsular Malaysia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Yai National Park | 🇹🇭 Thailand |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Milionia basalis sighting in Khao Yai National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 149th most-seen of the 221 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
May
In that month about 20% of wildlife watchers report a Milionia basalis in Khao Yai National Park on a given day, against under 5% in June and August–January, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Milionia basalis sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Khao Yai National Park, in our data
Khao Yai National Park is the only park on Wallace's Line with enough records to rate Milionia basalis sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Geometridae
The closest relatives of the Milionia basalis that you can see in Khao Yai National Park (family Geometridae, Geometer Moths) are Clara's Swallowtailed Moth (about 10%), Chorodna metaphaearia (about 10%) and Biston bengaliaria (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Milionia basalis is recorded against all the insects logged in Khao Yai National Park (6 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.
