Apodemus speciosus
In 3 days ~30% in a week ~60%
The large Japanese field mouse (Apodemus speciosus) is a nocturnal species of rodent in the family Muridae. It is endemic to Japan. The species appears to be present on all Japanese islands. It inhabits forests, grasslands, and cultivated fields, including rice paddies, at any altitude. Though occupying the same broad ecological niche as A. argenteus, the two species prefer different microhabitats: A. argenteus prefers dense canopy, while A. speciosus prefers open secondary forests.
Large Japanese field mice forage primarily at night, likely to avoid predation. They are omnivores but mostly known to be seed-eating mice, particularly around autumn and winter, as the mice hoard acorns and walnuts, which comprise 13-100% of their food. This makes them effective seed dispersers. Mast seeding can have serious effects on field mouse populations, including increases in overwinter survival, winter reproduction, and population density.
Large Japanese field mice have been observed changing their typical foraging behavior in response to varying light conditions. In response to higher light intensity, A. speciosus significantly... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sendai | 🇯🇵 Japan |
With luck
About 10% of wildlife watchers report a Large Japanese Field Mouse sighting in Sendai on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 10th most-seen of the 11 mammals 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.
August
In that month about 40% of wildlife watchers report a Large Japanese Field Mouse in Sendai on a given day, against under 5% in October to July, the lowest months.
Only Sendai, in our data
Sendai is the only city on Wallace's Line with enough records to rate Large Japanese Field Mouse sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Large Japanese Field Mouse is recorded against all the mammals logged in Sendai (11 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.
