Colias croceus
In 3 days ~30% in a week ~60%
Colias croceus, the clouded yellow, is a small butterfly of the family Pieridae, the yellows and whites. Colias croceus croceus Colias croceus f. deserticola (Verity, 1909) Colias croceus f. helice (Hübner) Colias croceus f. helicina (Oberthür, 1880)
Colias crocea f. mediterranea (Stauder, 1913) All of these forms are usually considered synonyms of Colias croceus. Colias croceus is one of the most widespread species in Europe. The common clouded yellow's breeding range is North Africa and southern Europe and eastwards through Turkey into the Middle East, but it occurs throughout much of Europe as a summer migrant, in good years individuals reaching Scandinavia. In Asia, its range extends into central Siberia in the north and barely into India in the south; it is not found in Central Asia.
This species is primarily an immigrant to the UK, originating from southern Europe and northern Africa. In the UK they can be seen on the south coast almost every year in varying numbers, and regularly breed there. Occurrence in the rest of the UK varies considerably from year to year, but they are increasingly observed as far north as Dumfries... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Aigüestortes National Park | 🇪🇸 Spain | |
| 2 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 3 | Picos de Europa National Park | 🇪🇸 Spain | |
| 4 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 5 | Ordesa y Monte Perdido National Park | 🇪🇸 Spain | |
| 6 | Triglav National Park | 🇸🇮 Slovenia | |
| 7 | Pyrénées National Park | 🇫🇷 France | |
| 8 | Monfragüe National Park | 🇪🇸 Spain | |
| 9 | Mercantour National Park | 🇫🇷 France | |
| 10 | Doñana National Park | 🇪🇸 Spain | |
| 11 | Cévennes National Park | 🇫🇷 France | |
| 12 | Camargue | 🇫🇷 France | |
| 13 | Ecrins National Park | 🇫🇷 France | |
| 14 | Vanoise National Park | 🇫🇷 France | |
| 15 | Bavarian Forest National Park | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Clouded Yellow sighting in Tehran on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 15th most-seen of the 34 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
May
In that month about 30% of wildlife watchers report a Clouded Yellow in Tehran on a given day, against under 5% in April, July, September and December–February, the lowest months. That is one of Tehran's driest months, with about 15 mm of rain against 45 mm in November.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Clouded Yellow sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
8th of 24
Of the 24 cities where we can rate Clouded Yellow sightings, Tehran ranks 8th at about 10%. The best odds are in Jerusalem (Israel, about 20%), Barcelona (Spain, about 20%) and Madrid (Spain, about 20%).
Same family: Pieridae
The closest relatives of the Clouded Yellow that you can see in Tehran (family Pieridae, Whites, Yellows, and Sulphurs) are Small White (about 20%), Pioneer White (about 10%) and Large White (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Clouded Yellow is recorded against all the insects logged in Tehran (16 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.
