Mamerthes orionalis silhouette

Silhouette: Zyoute (modified) · PhyloPic

Daily sighting probability ~20% · Possible
at Main Ridge Forest Reserve

In 3 days ~40% in a week ~70%

9 Verified sightings at Main Ridge Forest Reserve From 2019 to 2026
9 In 1 park
September Best month
🌙 Nocturnal When it's spotted

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Main Ridge Forest Reserve 🇹🇹 Trinidad and Tobago
~20%

More parks will be added in future updates.

Cities Where Found

# City Country Daily sighting probability
1 Buenos Aires 🇦🇷 Argentina
<5%

Before you go

What are the chances of seeing a Mamerthes orionalis in Main Ridge Forest Reserve?

Possible

About 20% of wildlife watchers report a Mamerthes orionalis sighting in Main Ridge Forest Reserve on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 163rd most-seen of the 346 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.

When is the best time to see a Mamerthes orionalis in Main Ridge Forest Reserve?

September

In that month about 40% of wildlife watchers report a Mamerthes orionalis in Main Ridge Forest Reserve on a given day, against under 5% in January, March–May, July and October, the lowest months.

What time of day is best to see a Mamerthes orionalis?

Between 8 and 11 pm

Across all the parks we cover, that three-hour window holds the most Mamerthes orionalis sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.

Where else can you see a Mamerthes orionalis?

Only Main Ridge Forest Reserve, in our data

Main Ridge Forest Reserve is the only park on Wallace's Line with enough records to rate Mamerthes orionalis sightings: about 20% of wildlife watchers there report one on a given day.

Which relatives of the Mamerthes orionalis live in Main Ridge Forest Reserve?

Same family: Erebidae

The closest relatives of the Mamerthes orionalis that you can see in Main Ridge Forest Reserve (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Virbia medarda (about 40%), Eulepidotis viridissima (about 40%) and Walker's Moth (about 30%), with each one's daily chance of a sighting.

Where does the Mamerthes orionalis sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Mamerthes orionalis is recorded against all the insects logged in Main Ridge Forest Reserve (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.

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