Prasinocyma semicrocea
In 3 days ~20% in a week ~40%
Prasinocyma semicrocea, the common gum emerald, is a moth of the family Geometridae. The species was first described by Francis Walker in 1861. It is found in Australia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Otway National Park | 🇦🇺 Australia | |
| 2 | Blue Mountains National Park | 🇦🇺 Australia |
With luck
About 10% of wildlife watchers report a Common Gum Emerald sighting in Blue Mountains National Park on a given day, based on 19 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 225th 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 40%, if each day is a fresh chance.
October and December–May
In those months about 10% of wildlife watchers report a Common Gum Emerald in Blue Mountains National Park on a given day, against under 5% in June–September and November, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Common Gum Emerald sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Among the best
Of the 2 parks where we can rate Common Gum Emerald sightings, Blue Mountains National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Great Otway National Park (Australia, about 10%).
GBIF citizen-science records
It is estimated from how often the Common Gum Emerald is recorded against all the insects logged in Blue Mountains National Park (19 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.
