Euphydryas aurinia
In 3 days ~20% in a week ~40%
The marsh fritillary (Euphydryas aurinia) is a butterfly of the family Nymphalidae. Commonly distributed in the Palearctic region, the marsh fritillary's common name derives from one of its several habitats, marshland. The prolonged larval stage lasts for approximately seven to eight months and includes a period of diapause over the winter. The larvae are dependent on the host food plant Succisa pratensis not only for feeding but also for hibernation, because silken webs are formed on the host plant as the gregarious larvae enter hibernation. Females lay eggs in batches on the host plant and are, like other batch-layers, selective about the location of oviposition because offspring survivorship levels for batch-layers are more tied to location selection than they are for single-egg layers.
As of 2019 the butterfly's global conservation status is considered of least concern, but it has faced rapid decline and is considered regionally vulnerable or endangered over much of its range. E. aurinia is represented by many subspecies. The most widely accepted are:
Euphydryas aurinia aurinia central Europe, southern Europe, western Siberia Euphydryas aurinia bulgarica (Fruhstorfer... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 2 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 3 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 4 | Mercantour National Park | 🇫🇷 France | |
| 5 | Vanoise National Park | 🇫🇷 France | |
| 6 | Picos de Europa National Park | 🇪🇸 Spain | |
| 7 | Triglav National Park | 🇸🇮 Slovenia | |
| 8 | Cévennes National Park | 🇫🇷 France | |
| 9 | Ecrins National Park | 🇫🇷 France | |
| 10 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Marsh Fritillary sighting in Porto on a given day, based on 35 verified sightings from GBIF citizen-science data. It is the 163rd most-seen of the 498 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
January to May
In those months about 10% of wildlife watchers report a Marsh Fritillary in Porto on a given day, against under 5% in June to December, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Marsh Fritillary sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 cities where we can rate Marsh Fritillary sightings, Porto has the highest daily chance: about 10%. Next come Barcelona (Spain, under 5%).
Same family: Nymphalidae
The closest relatives of the Marsh Fritillary that you can see in Porto (family Nymphalidae, Brush-footed Butterflies) are Speckled Wood (about 30%), Red Admiral (about 20%) and European Comma (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Marsh Fritillary is recorded against all the insects logged in Porto (35 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.
