Idaea costaria
In 3 days ~10% in a week ~20%
Idaea costaria is a species of moth of the family Geometridae. It is found in south-eastern Australia. Idaea costaria is externally very similar to Idaea inversata but, unlike that species, has a two-coloured head pattern. Idaea costaria has a creamy-white patch between the antennae, whereas I. inversata is dark reddish throughout this area. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Blue Mountains National Park | 🇦🇺 Australia |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Melbourne | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report an Idaea costaria sighting in Blue Mountains National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 681st 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 20%, if each day is a fresh chance.
March and October
In those months about 10% of wildlife watchers report an Idaea costaria in Blue Mountains National Park on a given day, against under 5% in April–September and November–February, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Idaea costaria 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 Idaea costaria sightings: under 5% of wildlife watchers there report one on a given day.
Same genus: Idaea
The closest relatives of the Idaea costaria that you can see in Blue Mountains National Park (genus Idaea) are Idaea halmaea (about 10%), 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 costaria is recorded against all the insects logged in Blue Mountains National Park (5 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.
