Libellula incesta
In 3 days ~30% in a week ~60%
Libellula incesta, the slaty skimmer, is a dragonfly of the skimmer family, native to eastern United States and southern Ontario, Quebec, and New Brunswick. Adults are 5.28 cm (2.08 in) long. Mature males are dark blue with black heads. Females and juveniles have brown abdomens with a darker stripe down their backs. Adults fly from June to August. Larvae are habitat specialists, found in the benthos of permanent lakes. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Congaree National Park | 🇺🇸 United States | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Big Cypress National Preserve | 🇺🇸 United States | |
| 4 | Shenandoah National Park | 🇺🇸 United States | |
| 5 | Everglades National Park | 🇺🇸 United States | |
| 6 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | Austin | 🇺🇸 United States | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | New York City | 🇺🇸 United States | |
| 6 | Baltimore | 🇺🇸 United States | |
| 7 | Philadelphia | 🇺🇸 United States | |
| 8 | Orlando | 🇺🇸 United States | |
| 9 | Miami | 🇺🇸 United States | |
| 10 | Dallas | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Slaty Skimmer sighting in Acadia National Park on a given day, based on 40 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 76th most-seen of the 405 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.
August
In that month about 20% of wildlife watchers report a Slaty Skimmer in Acadia National Park on a given day, against under 5% in October to May, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Slaty Skimmer sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 6 parks where we can rate Slaty Skimmer sightings, Acadia National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Congaree National Park (United States, about 10%).
Same genus: Libellula
The closest relatives of the Slaty Skimmer that you can see in Acadia National Park (genus Libellula, Chasers and King Skimmers) are Twelve-Spotted Skimmer (about 10%) and Four-Spotted Skimmer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Slaty Skimmer is recorded against all the insects logged in Acadia National Park (40 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.
