Libellula pulchella
In 3 days ~30% in a week ~50%
The twelve-spotted skimmer (Libellula pulchella) is a common North American skimmer dragonfly, found in southern Canada and in all 48 of the contiguous U.S. states. It is a large species, at 50 mm (2.0 in) long. Each wing has three brown spots. In adult males, additional white spots form between the brown ones and at the bases of the hindwings; it is sometimes called the ten-spot skimmer for the number of these white spots. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Point Pelee National Park | 🇨🇦 Canada | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Yosemite National Park | 🇺🇸 United States | |
| 4 | Riding Mountain National Park | 🇨🇦 Canada | |
| 5 | Rocky Mountain National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 2 | Denver | 🇺🇸 United States | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Montreal | 🇨🇦 Canada | |
| 5 | Sacramento | 🇺🇸 United States | |
| 6 | Salt Lake City | 🇺🇸 United States | |
| 7 | Chicago | 🇺🇸 United States | |
| 8 | New York City | 🇺🇸 United States | |
| 9 | Detroit | 🇺🇸 United States | |
| 10 | Portland | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Twelve-Spotted Skimmer sighting in Yosemite National Park on a given day, based on 35 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 50th most-seen of the 227 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.
June
In that month about 20% of wildlife watchers report a Twelve-Spotted Skimmer in Yosemite National Park on a given day, against under 5% in October to April, the lowest months. That is one of Yosemite National Park's driest months, with about 25 mm of rain against 220 mm in January.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Twelve-Spotted Skimmer sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 5 parks where we can rate Twelve-Spotted Skimmer sightings, Yosemite National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Point Pelee National Park (Canada, about 10%) and Acadia National Park (United States, about 10%).
Same genus: Libellula
The closest relatives of the Twelve-Spotted Skimmer that you can see in Yosemite National Park (genus Libellula, Chasers and King Skimmers) are Four-Spotted Skimmer (about 10%) and Flame Skimmer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Twelve-Spotted Skimmer is recorded against all the insects logged in Yosemite National Park (35 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.
