Siam Weed Defoliator

Siam Weed Defoliator

Pareuchaetes pseudoinsulata

Daily sighting probability ~10% · With luck
at Main Ridge Forest Reserve

In 3 days ~30% in a week ~60%

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

About the Siam Weed Defoliator

Pareuchaetes pseudoinsulata is a moth of the subfamily Arctiinae native to Venezuela and Trinidad and Tobago. It is an introduced species in Sri Lanka, as well as in Malaysia, Indonesia, the Philippines and Guam. Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Main Ridge Forest Reserve 🇹🇹 Trinidad and Tobago
~10%

More parks will be added in future updates.

Cities Where Found

# City Country Daily sighting probability
1 Kochi 🇮🇳 India
<5%

Before you go

What are the chances of seeing a Siam Weed Defoliator in Main Ridge Forest Reserve?

With luck

About 10% of wildlife watchers report a Siam Weed Defoliator sighting in Main Ridge Forest Reserve on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 296th most-seen of the 346 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.

When is the best time to see a Siam Weed Defoliator in Main Ridge Forest Reserve?

April

In that month about 30% of wildlife watchers report a Siam Weed Defoliator in Main Ridge Forest Reserve on a given day, against under 5% in May–June and August–January, the lowest months. That is one of Main Ridge Forest Reserve's driest months, with about 65 mm of rain against 230 mm in October.

What time of day is best to see a Siam Weed Defoliator?

Between 9 pm and midnight

Across all the parks we cover, that three-hour window holds the most Siam Weed Defoliator sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.

Where else can you see a Siam Weed Defoliator?

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 Siam Weed Defoliator sightings: about 10% of wildlife watchers there report one on a given day.

Which relatives of the Siam Weed Defoliator live in Main Ridge Forest Reserve?

Same family: Erebidae

The closest relatives of the Siam Weed Defoliator 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 Siam Weed Defoliator sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Siam Weed Defoliator is recorded against all the insects logged in Main Ridge Forest Reserve (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.

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