Orthonama olivacea
In 3 days ~10% in a week ~30%
Orthonama obstipata, the gem, is a moth of the family Geometridae. The species was first described by Johan Christian Fabricius in 1794. It is a cosmopolitan species. In continental Europe though in the northeast, its range does not significantly extend beyond the Baltic region and it is absent from northern Russia. This well-flying species is prone to vagrancy and able to cross considerable distances of the open sea; it can thus be regularly found on the British Isles (though mainly in the south) and even on Iceland.
Under its junior synonyms Nycterosea brunneipennis and Geometra fluviata, the gem is the type species of genera Nycterosea and Percnoptilota, respectively. The latter is treated as a junior synonym of the former, but Nycterosea, though usually included in Orthonama these days, may warrant recognition as an independent genus after all.
The adult's wingspan is 18–21 mm (0.71–0.83 in); in their core range (e.g. Belgium and the Netherlands) they can be seen between April and November, but in outlying regions, they may only be regularly encountered in late summer and early autumn, when vagrant individuals abound. This species is strongly sexually... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | La Amistad International Park (Panama) | 🇵🇦 Panama |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Orthonama olivacea sighting in La Amistad International Park (Panama) on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 202nd most-seen of the 299 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
February and March
In those months about 10% of wildlife watchers report an Orthonama olivacea in La Amistad International Park (Panama) on a given day, against under 5% in April to January, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Orthonama olivacea sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
Only La Amistad International Park (Panama), in our data
La Amistad International Park (Panama) is the only park on Wallace's Line with enough records to rate Orthonama olivacea sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Geometridae
The closest relatives of the Orthonama olivacea that you can see in La Amistad International Park (Panama) (family Geometridae, Geometer Moths) are Opisthoxia miletia (about 10%), Oospila venezuelata (about 10%) and Oxydia trychiata (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Orthonama olivacea is recorded against all the insects logged in La Amistad International Park (Panama) (9 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.
