Anisosticta bitriangularis
In 3 days ~30% in a week ~50%
Anisosticta bitriangularis, known generally as the marsh lady beetle or swamp lady beetle, is a species of lady beetle in the family Coccinellidae. It is found in Europe and Northern Asia (excluding China) and North America (Labrador to New Jersey, west to Alaska, California and British Columbia). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Elk Island National Park | 🇨🇦 Canada |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Marsh Lady Beetle sighting in Elk Island National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 97th most-seen of the 112 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
May
In that month about 20% of wildlife watchers report a Marsh Lady Beetle in Elk Island National Park on a given day, against under 5% in July and September–April, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Marsh Lady Beetle sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Elk Island National Park, in our data
Elk Island National Park is the only park on Wallace's Line with enough records to rate Marsh Lady Beetle sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Coccinellidae
The closest relatives of the Marsh Lady Beetle that you can see in Elk Island National Park (family Coccinellidae, Lady Beetles) are Seven-Spotted Lady Beetle (about 30%), Thirteen-Spotted Lady Beetle (about 10%) and Eye-Spotted Lady Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Marsh Lady Beetle is recorded against all the insects logged in Elk Island National Park (5 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.
