Pyrgus alveus
In 3 days ~30% in a week ~50%
The Large Grizzled skipper (Pyrgus alveus) is a species of skipper butterfly (family Hesperiidae). This is a rather variable species with a wingspan of 22–32 mm (not always particularly "large") with several subspecies having been described. As with most Pyrgus species it has dark brown wings with pale chequered margins and is rather difficult to identify specifically in the field but good views reveal clear, well-spaced white spotting on the forewing and much fainter markings on the hindwings.
The species complex of Pyrgus alveus agg. has not yet been adequately researched from a taxonomic point of view. In particular, the separation and evaluation of the taxa Pyrgus alveus, Pyrgus trebevicensis and Pyrgus accretus is considered to be extremely problematic. Therefore, in many cases, the reports can neither be clearly assigned nor is a taxonomic separation based on biological differences within the complex confirmed. Many authors consequently regard Pyrgus trebevicensis and Pyrgus accretus as synonyms, subspecies or ecological forms of Pyrgus alveus. Because of the hitherto unsolved problems with regard to taxonomy and identification, the complex Pyrgus alveus / Pyrgus... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vanoise National Park | 🇫🇷 France |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Large Grizzled Skipper sighting in Vanoise National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 220th most-seen of the 308 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.
July
In that month about 20% of wildlife watchers report a Large Grizzled Skipper in Vanoise National Park on a given day, against under 5% in September to June, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Large Grizzled Skipper sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Vanoise National Park, in our data
Vanoise National Park is the only park on Wallace's Line with enough records to rate Large Grizzled Skipper sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Pyrgus
The closest relatives of the Large Grizzled Skipper that you can see in Vanoise National Park (genus Pyrgus, Grizzled Skippers) are Southern Grizzled Skipper (about 10%), Olive Skipper (about 10%) and Carline Skipper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Large Grizzled Skipper is recorded against all the insects logged in Vanoise 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.
