Rivellia syngenesiae
In 3 days ~10% in a week ~20%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Porto | 🇵🇹 Portugal |
Rare
Under 5% of wildlife watchers report a Rivellia syngenesiae sighting in Porto on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 377th most-seen of the 498 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
April and July
In those months about 10% of wildlife watchers report a Rivellia syngenesiae in Porto on a given day, against under 5% in May–June and August–March, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Rivellia syngenesiae 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 Porto, in our data
Porto is the only city on Wallace's Line with enough records to rate Rivellia syngenesiae sightings: under 5% of wildlife watchers there report one on a given day.
Same order: Diptera
The closest relatives of the Rivellia syngenesiae that you can see in Porto (order Diptera, Flies) are Marmalade Hover Fly (about 10%), Stripe-Eyed Lagoon Fly (about 10%) and Common Drone Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rivellia syngenesiae is recorded against all the insects logged in Porto (8 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.
