Formica truncorum
In 3 days ~30% in a week ~60%
Formica truncorum is a species of wood ant from the genus Formica. It is distributed across a variety of locations worldwide, including central Europe and Japan. Workers can range from 3.5 to 9.0mm and are uniquely characterized by small hairs covering their entire bodies. Like all other ants, F. truncorum is eusocial and demonstrates many cooperative behaviors that are unique to its order. Colonies are either monogynous, with one queen, or polygynous, with many queens, and these two types of colonies differ in many characteristics.
F. truncorum is located in many places worldwide, such as northern Japan, the Jura Mountains and many regions from Italy to Norway. The colonies, which can be polygynous and often polydomous (where several nests are occupied by one colony), are spread out in regions of woodland borders, where the ants will make their nests in tree stumps.
F. truncorum ants are characterized by a grey-brown gaster and bright yellow-red head and thorax. The smaller workers are normally darker in color. They can be distinguished from other species of Formica by the small erect setae covering their entire body. Workers can range in size... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Trunk Ant sighting in Taroko National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 160th most-seen of the 447 insects 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.
July
In that month about 20% of wildlife watchers report a Trunk Ant in Taroko National Park on a given day, against under 5% in September and November–April, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Trunk Ant sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Taroko National Park, in our data
Taroko National Park is the only park on Wallace's Line with enough records to rate Trunk Ant sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Formicidae
The closest relatives of the Trunk Ant that you can see in Taroko National Park (family Formicidae, Ants) are Camponotus habereri (about 50%), Polyrhachis wolfi (about 20%) and Yellow Crazy Ant (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Trunk Ant is recorded against all the insects logged in Taroko National Park (12 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.
