Crowned Slug Moth

Crowned Slug Moth

Isa textula

Daily sighting probability <5% · Rare
at Washington

In 3 days ~10% in a week ~20%

49 Verified sightings at Washington
27 In all 2 parks From 2019 to 2026
October Best month
☀️🌙 Day & Night When it's spotted

About the Crowned Slug Moth

Isa textula, the crowned slug moth or skiff moth is a moth of the family Limacodidae. It is found in North America from Minnesota, southern Ontario and Massachusetts to Florida, Texas, and Mississippi. The larvae feed on the leaves of various trees, including oak, cherry, maple, basswood, elm and beech.

Another moth, Prolimacodes badia, is also referred to by the common name skiff moth. Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Shenandoah National Park 🇺🇸 United States
~10%
2 Great Smoky Mountains National Park 🇺🇸 United States
<5%

Cities Where Found

# City Country Daily sighting probability
1 Washington 🇺🇸 United States
<5%
2 Orlando 🇺🇸 United States
<5%
3 Boston 🇺🇸 United States
<5%
4 Houston 🇺🇸 United States
<5%
5 New York City 🇺🇸 United States
<5%

Before you go

What are the chances of seeing a Crowned Slug Moth in Washington?

Rare

Under 5% of wildlife watchers report a Crowned Slug Moth sighting in Washington on a given day, based on 49 verified sightings from GBIF citizen-science data. It is the 470th most-seen of the 1807 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.

When is the best time to see a Crowned Slug Moth in Washington?

July and October

In those months about 10% of wildlife watchers report a Crowned Slug Moth in Washington on a given day, against under 5% in August–September and November–June, the lowest months.

What time of day is best to see a Crowned Slug Moth?

Between 8 and 11 pm

Across all the parks we cover, that three-hour window holds the most Crowned Slug Moth 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.

Is Washington the best place to see a Crowned Slug Moth?

Yes

Of the 5 cities where we can rate Crowned Slug Moth sightings, Washington has the highest daily chance: under 5%. Next come Orlando (United States, under 5%) and Boston (United States, under 5%).

Where does the Crowned Slug Moth sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Crowned Slug Moth is recorded against all the insects logged in Washington (49 verified sightings), 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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