Celastrina lucia
In 3 days ~80% in a week >90%
Celastrina lucia, the lucia azure, northern azure, eastern spring azure or northern spring azure, is a species of butterfly of the family Lycaenidae. It is found eastern North America, ranging from the Maritimes south through the Appalachian Mountains to West Virginia.
The wingspan is between 22–35 mm. Adults are sexually dimorphic. They are on wing from April to July. The larvae feed on Vaccinium species, including V. pallidum. Until the early 1990s, most North American azures were thought to be a single species, Celastrina ladon. More recently, research has revealed that there are many different species of azures, including C. lucia, which had been treated as a subspecies of C. ladon.
Cherry gall azure (C. serotina) Holly azure (C. idella) Spring azure (C. ladon) Summer azure (C. neglecta) Data related to Celastrina lucia at Wikispecies Media related to Celastrina lucia at Wikimedia Commons Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Isle Royale National Park | 🇺🇸 United States | |
| 2 | Cape Breton Highlands National Park | 🇨🇦 Canada | |
| 3 | Riding Mountain National Park | 🇨🇦 Canada | |
| 4 | Elk Island National Park | 🇨🇦 Canada | |
| 5 | Gros Morne National Park | 🇨🇦 Canada | |
| 6 | Jasper National Park | 🇨🇦 Canada | |
| 7 | Acadia National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Edmonton | 🇨🇦 Canada | |
| 2 | Toronto | 🇨🇦 Canada | |
| 3 | Calgary | 🇨🇦 Canada | |
| 4 | Montreal | 🇨🇦 Canada | |
| 5 | New York City | 🇺🇸 United States |
Likely
About 40% of wildlife watchers report a Northern Azure sighting in Isle Royale National Park on a given day, based on 44 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 3rd most-seen of the 48 insects we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Northern Azure 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 Northern Azure sightings, Isle Royale National Park has the highest daily chance: about 40%. Next come Cape Breton Highlands National Park (Canada, about 20%) and Riding Mountain National Park (Canada, about 10%).
GBIF citizen-science records
It is estimated from how often the Northern Azure is recorded against all the insects logged in Isle Royale National Park (44 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.
