Idaea halmaea
In 3 days ~30% in a week ~60%
Idaea halmaea, the two-spotted wave, is a moth of the family Geometridae. The species was first described by Edward Meyrick in 1888. It is found in Australia, including Tasmania. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Blue Mountains National Park | 🇦🇺 Australia | |
| 2 | Lamington National Park | 🇦🇺 Australia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Melbourne | 🇦🇺 Australia |
With luck
About 10% of wildlife watchers report an Idaea halmaea sighting in Blue Mountains National Park on a given day, based on 45 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 68th most-seen of the 789 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
September and October
In those months about 20% of wildlife watchers report an Idaea halmaea in Blue Mountains National Park on a given day, against under 5% in May to August, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Idaea halmaea sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Idaea halmaea sightings, Blue Mountains National Park has the highest daily chance: about 10%. Next come Lamington National Park (Australia, about 10%).
Same genus: Idaea
The closest relatives of the Idaea halmaea that you can see in Blue Mountains National Park (genus Idaea) are Purple Wave (about 10%) and Flecked Wave Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Idaea halmaea is recorded against all the insects logged in Blue Mountains National Park (45 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.
