Thymelicus lineola
In 3 days ~50% in a week ~80%
Thymelicus lineola, known in Europe as the Essex skipper and in North America as the European skipper, is a species of butterfly in the family Hesperiidae. With a wingspan of 2.5 to 2.9 cm (0.98 to 1.14 in), it is very similar in appearance to the small skipper, Thymelicus sylvestris. They can be told apart by the forward-facing flattish part of the antenna tip: in the Essex Skipper this face is black, whereas in the Small Skipper it is orange or brown. In males, there is a difference in the scent mark. In Essex Skipper this is a fine, straight, short dark line on the forewing, parallel to the wing edge; in the Small Skipper males, this line is bolder and bent. This butterfly occurs throughout much of the Palaearctic region. Its range is from southern Scandinavia through Europe to North Africa and east to Central Asia. It was only identified in the UK in 1889, and its range is expanding both in England and in northern Europe. In North America, this butterfly was accidentally introduced in 1910 via London, Ontario and has spread across southern Canada and into several northern US states. In many parts of the Northeastern United States it is the most abundant skipper. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Elk Island National Park | 🇨🇦 Canada | |
| 2 | Gros Morne National Park | 🇨🇦 Canada | |
| 3 | Mercantour National Park | 🇫🇷 France | |
| 4 | Vanoise National Park | 🇫🇷 France | |
| 5 | Yellowstone National Park | 🇺🇸 United States | |
| 6 | Ecrins National Park | 🇫🇷 France | |
| 7 | Riding Mountain National Park | 🇨🇦 Canada | |
| 8 | Aigüestortes National Park | 🇪🇸 Spain | |
| 9 | Grand Teton National Park | 🇺🇸 United States | |
| 10 | Glacier National Park | 🇺🇸 United States | |
| 11 | Jasper National Park | 🇨🇦 Canada | |
| 12 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 13 | Pyrénées National Park | 🇫🇷 France | |
| 14 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 15 | Wadden Sea National Park | 🇩🇪 Germany | |
| 16 | Cévennes National Park | 🇫🇷 France | |
| 17 | Banff National Park | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Edmonton | 🇨🇦 Canada | |
| 3 | Kharkiv | 🇺🇦 Ukraine | |
| 4 | Calgary | 🇨🇦 Canada | |
| 5 | Birmingham | 🇬🇧 United Kingdom | |
| 6 | London | 🇬🇧 United Kingdom | |
| 7 | Toronto | 🇨🇦 Canada | |
| 8 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 9 | Budapest | 🇭🇺 Hungary | |
| 10 | Warsaw | 🇵🇱 Poland |
Possible
About 20% of wildlife watchers report an Essex Skipper sighting in Yellowstone National Park on a given day, based on 118 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 160 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
July and August
In those months about 30% of wildlife watchers report an Essex Skipper in Yellowstone National Park on a given day, against under 5% in October to June, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Essex Skipper sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
5th of 17
Of the 17 parks where we can rate Essex Skipper sightings, Yellowstone National Park ranks 5th at about 20%. The best odds are in Elk Island National Park (Canada, about 30%), Gros Morne National Park (Canada, about 30%) and Mercantour National Park (France, about 20%).
GBIF citizen-science records
It is estimated from how often the Essex Skipper is recorded against all the insects logged in Yellowstone National Park (118 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.
