Orthoprosopa grisea
In 3 days ~20% in a week ~50%
Orthoprosopa grisea is a species of hoverfly in the family Syrphidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Grampians National Park | 🇦🇺 Australia | |
| 2 | Great Otway National Park | 🇦🇺 Australia | |
| 3 | Blue Mountains National Park | 🇦🇺 Australia |
With luck
About 10% of wildlife watchers report an Orthoprosopa grisea sighting in Grampians National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 104th most-seen of the 148 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
October
In that month about 20% of wildlife watchers report an Orthoprosopa grisea in Grampians National Park on a given day, against under 5% in January–February, April–September and November, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Orthoprosopa grisea sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 parks where we can rate Orthoprosopa grisea sightings, Grampians National Park has the highest daily chance: about 10%. Next come Great Otway National Park (Australia, under 5%) and Blue Mountains National Park (Australia, under 5%).
Same family: Syrphidae
The closest relatives of the Orthoprosopa grisea that you can see in Grampians National Park (family Syrphidae, Hover Flies) are Yellow-Shouldered Stout Hover Fly (about 20%), Common Halfband (about 20%) and Native Drone Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Orthoprosopa grisea is recorded against all the insects logged in Grampians National Park (6 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.
