Tapinoma sessile
In 3 days ~10% in a week ~30%
Tapinoma sessile is a species of small ant that goes by the common names odorous house ant, sugar ant, stink ant, and coconut ant. Their colonies are polydomous (consisting of multiple nests) and polygynous (containing multiple reproducing queens). Like many social insects, T. sessile employs complex foraging strategies, allocates food depending on environmental conditions, and engages in competition with other insects.
T. sessile can be found in a huge diversity of habitats, including within houses. They forage mainly for honeydew, which is produced by aphids and scale insects that are guarded and tended by the ants, as well as floral nectar and other sugary foods. They are common household pests and are attracted to sources of water and sweets.
Tapinoma sessile have long been suspected of exhibiting cloning behaviors similar to those observed in black crazy ants. This hypothesis has recently been confirmed through experimental evidence. In a notable experiment conducted by Marcello Ponzo, a colony consisting of seven queens and approximately 3,000 to 4,000 workers was kept in a controlled outworld and nest environment after being captured from the wild. Within a period of almost two months, the colony increased its number of queens from seven to ten under optimal conditions and a nutritious diet. This observation provides strong evidence supporting the theory of cloning in Tapinoma sessile.
Like other ants, T. sessile is eusocial. This is characterized by reproductive division of labor, cooperative care of the young, and the overlapping of multiple generations. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States | |
| 3 | Great Bear Rainforest | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | New York City | 🇺🇸 United States | |
| 2 | Washington | 🇺🇸 United States | |
| 3 | Philadelphia | 🇺🇸 United States | |
| 4 | Baltimore | 🇺🇸 United States | |
| 5 | Chicago | 🇺🇸 United States | |
| 6 | Portland | 🇺🇸 United States | |
| 7 | Dallas | 🇺🇸 United States | |
| 8 | Boston | 🇺🇸 United States | |
| 9 | Seattle | 🇺🇸 United States | |
| 10 | Detroit | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Odorous House Ant sighting in Great Bear Rainforest on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 159th most-seen of the 235 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May to July
In those months about 10% of wildlife watchers report an Odorous House Ant in Great Bear Rainforest on a given day, against under 5% in August to April, the lowest months. Those are among Great Bear Rainforest's driest months, with about 130 mm of rain a month against 480 mm in November.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Odorous House Ant sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 3
Of the 3 parks where we can rate Odorous House Ant sightings, Great Bear Rainforest ranks 3rd at under 5%. The best odds are in Sequoia and Kings Canyon National Parks (United States, about 10%) and Shenandoah National Park (United States, about 10%).
Same family: Formicidae
The closest relatives of the Odorous House Ant that you can see in Great Bear Rainforest (family Formicidae, Ants) are Formica neorufibarbis (about 10%), Western Black Carpenter Ant (about 10%) and Pale-Legged Fuzzy Ant (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Odorous House Ant is recorded against all the insects logged in Great Bear Rainforest (11 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.
