Rialla villosa
In 3 days ~50% in a week ~80%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nahuel Huapi National Park | 🇦🇷 Argentina |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Rialla villosa sighting in Nahuel Huapi National Park on a given day, based on 17 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 5th most-seen of the 39 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
November and December
In those months about 40% of wildlife watchers report a Rialla villosa in Nahuel Huapi National Park on a given day, against under 5% in March–May and July–October, the lowest months. Those are among Nahuel Huapi National Park's driest months, with about 90 mm of rain a month against 310 mm in June.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Rialla villosa sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Nahuel Huapi National Park, in our data
Nahuel Huapi National Park is the only park on Wallace's Line with enough records to rate Rialla villosa sightings: about 20% of wildlife watchers there report one on a given day.
Same order: Odonata
The closest relatives of the Rialla villosa that you can see in Nahuel Huapi National Park (order Odonata, Dragonflies and Damselflies) are Rhionaeschna diffinis (about 10%) and Cyanallagma interruptum (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rialla villosa is recorded against all the insects logged in Nahuel Huapi National Park (17 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.
