Question 1

What are the chances of seeing a Japanese Common Grass Yellow in Nikko National Park?

Accepted Answer

Possible. About 20% of wildlife watchers report a Japanese Common Grass Yellow sighting in Nikko National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 16th most-seen of the 86 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.

Question 2

When is the best time to see a Japanese Common Grass Yellow in Nikko National Park?

Accepted Answer

October. In that month about 50% of wildlife watchers report a Japanese Common Grass Yellow in Nikko National Park on a given day, against under 5% in March–July and November, the lowest months.

Question 3

What time of day is best to see a Japanese Common Grass Yellow?

Accepted Answer

Between 1 and 4 pm. Across all the parks we cover, that three-hour window holds the most Japanese Common Grass Yellow sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.

Question 4

Is Nikko National Park the best place to see a Japanese Common Grass Yellow?

Accepted Answer

Yes. Of the 2 parks where we can rate Japanese Common Grass Yellow sightings, Nikko National Park has the highest daily chance: about 20%. Next come Taroko National Park (Taiwan, about 10%).

Question 5

Which relatives of the Japanese Common Grass Yellow live in Nikko National Park?

Accepted Answer

Same order: Lepidoptera. The closest relatives of the Japanese Common Grass Yellow that you can see in Nikko National Park (order Lepidoptera, Butterflies and Moths) are Pterodecta felderi (about 30%), Mourning Cloak (about 30%) and Diana Treebrown (about 30%), with each one's daily chance of a sighting.

Question 6

Where does the Japanese Common Grass Yellow sighting chance come from?

Accepted Answer

GBIF citizen-science records. It is estimated from how often the Japanese Common Grass Yellow is recorded against all the insects logged in Nikko National Park (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.

#	Park	Country	Daily sighting probability
1	Nikko National Park	🇯🇵 Japan	~20%
2	Taroko National Park	🇹🇼 Taiwan	~10%

#	City	Country	Daily sighting probability
1	Nagoya	🇯🇵 Japan	~30%
2	Osaka	🇯🇵 Japan	~20%
3	Suzhou	🇨🇳 China	~20%
4	Tokyo	🇯🇵 Japan	~20%
5	Nanjing	🇨🇳 China	~10%
6	Fukuoka	🇯🇵 Japan	~10%
7	Sendai	🇯🇵 Japan	~10%
8	Shanghai	🇨🇳 China	~10%
9	Seoul	🇰🇷 South Korea	~10%

Japanese Common Grass Yellow

About the Japanese Common Grass Yellow

Recent sightings of Japanese Common Grass Yellow in Nikko National Park

Global Distribution

Parks Where Found

Cities Where Found

Closest Relatives at Nikko National Park

Pterodecta felderi

Mourning Cloak

Diana Treebrown

Tropical Fritillary

Aglia japonica

Goschkevitschi's Labyrinth

Ōmizuao

Daseochaeta viridis

Polytremis pellucida

Clavipalpula aurariae

Japanese Silk Moth

Golden-Crested Moth

Before you go