Question 1

What are the chances of seeing a Japanese Common Grass Yellow in Tokyo?

Accepted Answer

Possible. About 20% of wildlife watchers report a Japanese Common Grass Yellow sighting in Tokyo on a given day, based on 648 verified sightings from GBIF citizen-science data. It is the 27th most-seen of the 1013 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.

Question 2

When is the best time to see a Japanese Common Grass Yellow in Tokyo?

Accepted Answer

September to November. In those months about 30% of wildlife watchers report a Japanese Common Grass Yellow in Tokyo on a given day, against under 5% in January, the lowest month.

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 Tokyo the best place to see a Japanese Common Grass Yellow?

Accepted Answer

4th of 9. Of the 9 cities where we can rate Japanese Common Grass Yellow sightings, Tokyo ranks 4th at about 20%. The best odds are in Nagoya (Japan, about 30%), Osaka (Japan, about 20%) and Suzhou (China, about 20%).

Question 5

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 Tokyo (648 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.

#	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 Tokyo

Global Distribution

Parks Where Found

Cities Where Found

Closest Relatives at Tokyo

Spotless Grass Yellow

Small White

Colias poliographus

Asian Green-Veined White

Yellow Tip

Pale Grass Blue

Chinese Yellow Swallowtail

Red Ring Skirt

Common Straight Swift

Common Bluebottle

Tropical Fritillary

Small Copper

Before you go

What are the chances of seeing a Japanese Common Grass Yellow in Tokyo?

When is the best time to see a Japanese Common Grass Yellow in Tokyo?

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

Is Tokyo the best place to see a Japanese Common Grass Yellow?

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