Prasinocyma rhodocosma
In 3 days ~30% in a week ~50%
Prasinocyma rhodocosma, the northern emerald, is a species of moth of the family Geometridae first described by Edward Meyrick in 1888. It is found in Australia in northern Western Australia, the Northern Territory, Queensland and New South Wales.
The wingspan is about 30 mm. The larvae feed on young shoots and leaves of Eucalyptus species Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lamington National Park | 🇦🇺 Australia | |
| 2 | Blue Mountains National Park | 🇦🇺 Australia |
With luck
About 10% of wildlife watchers report a Northern Emerald sighting in Blue Mountains National Park on a given day, based on 28 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 122nd 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 50%, if each day is a fresh chance.
May
In that month about 20% of wildlife watchers report a Northern Emerald in Blue Mountains National Park on a given day, against under 5% in February and July–August, the lowest months. That is one of Blue Mountains National Park's driest months, with about 40 mm of rain against 150 mm in March.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Northern Emerald sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 2 parks where we can rate Northern Emerald sightings, Blue Mountains National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Lamington National Park (Australia, about 10%).
GBIF citizen-science records
It is estimated from how often the Northern Emerald is recorded against all the insects logged in Blue Mountains National Park (28 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.
