Ladona julia
In 3 days ~70% in a week ~90%
The chalk-fronted corporal (Ladona julia) is a skimmer dragonfly found in the northern United States and southern Canada. Juveniles of both sexes are light reddish brown, with white shoulder stripes and a black stripe down the middle of the abdomen. As they mature, males develop a white pruinescence on the top of the thorax and at the base of the abdomen, while the rest of the abdomen turns black. Females become almost uniformly dark brown, with a dusting of gray pruinescence near the base of the abdomen; a few develop the same color pattern as the males.
Chalk-fronted corporals often perch horizontally on the ground or on floating objects in the water, flying up to take prey from the air. They are gregarious for dragonflies, and are commonly seen perching in groups. They readily approach humans to feed on the mosquitoes and biting flies that humans attract. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Voyageurs National Park | 🇺🇸 United States | |
| 2 | Isle Royale National Park | 🇺🇸 United States | |
| 3 | Cape Breton Highlands National Park | 🇨🇦 Canada | |
| 4 | Riding Mountain National Park | 🇨🇦 Canada | |
| 5 | Acadia National Park | 🇺🇸 United States | |
| 6 | Great Bear Rainforest | 🇨🇦 Canada | |
| 7 | Pacific Rim National Park Reserve | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | Montreal | 🇨🇦 Canada | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Minneapolis [Saint Paul] | 🇺🇸 United States |
Possible
About 30% of wildlife watchers report a Chalk-Fronted Corporal sighting in Voyageurs National Park on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 5th most-seen of the 20 insects we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
June
In that month about 50% of wildlife watchers report a Chalk-Fronted Corporal in Voyageurs National Park on a given day, against under 5% in May and September, the lowest months. November to April have too few records to rate.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Chalk-Fronted Corporal sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 7 parks where we can rate Chalk-Fronted Corporal sightings, Voyageurs National Park has the highest daily chance: about 30%. Next come Isle Royale National Park (United States, about 30%) and Cape Breton Highlands National Park (Canada, about 20%).
GBIF citizen-science records
It is estimated from how often the Chalk-Fronted Corporal is recorded against all the insects logged in Voyageurs National Park (20 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.
