Ōmizuao
Daily sighting probability ~10% · With luck
at Tokyo

In 3 days ~20% in a week ~40%

153 Verified sightings at Tokyo
8 In 1 park From 2019 to 2026
August Best month
☀️🌙 Day & Night When it's spotted

About the Ōmizuao

Actias aliena is a moth in the family Saturniidae. It is a large silk moth with a wingspan ranging from 100–110 mm. It is found in Japan. Its mitochondrial genome has been sequenced. Their mitochondrial genome is 15,243 bp (base pairs) long. Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Nikko National Park 🇯🇵 Japan
~20%

More parks will be added in future updates.

Cities Where Found

# City Country Daily sighting probability
1 Tokyo 🇯🇵 Japan
~10%
2 Osaka 🇯🇵 Japan
~10%

Before you go

What are the chances of seeing a Ōmizuao in Tokyo?

With luck

About 10% of wildlife watchers report a Ōmizuao sighting in Tokyo on a given day, based on 153 verified sightings from GBIF citizen-science data. It is the 103rd most-seen of the 1013 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.

When is the best time to see a Ōmizuao in Tokyo?

April to September

In those months about 10% of wildlife watchers report a Ōmizuao in Tokyo on a given day, against under 5% in October to March, the lowest months.

What time of day is best to see a Ōmizuao?

Between midnight and 3 am

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

Is Tokyo the best place to see a Ōmizuao?

Yes

Of the 2 cities where we can rate Ōmizuao sightings, Tokyo has the highest daily chance: about 10%. Next come Osaka (Japan, about 10%).

Where does the Ōmizuao sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Ōmizuao is recorded against all the insects logged in Tokyo (153 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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