Enallagma aspersum
In 3 days ~10% in a week ~20%
Enallagma aspersum, the azure bluet, is a species of narrow-winged damselfly in the family Coenagrionidae. It is found in North America in Canada and the United States. The IUCN conservation status of Enallagma aspersum is "least concern", with no immediate threat to the species' survival. The population is stable. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Acadia National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | New York City | 🇺🇸 United States | |
| 2 | Boston | 🇺🇸 United States | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Washington | 🇺🇸 United States | |
| 5 | Chicago | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Azure Bluet sighting in Boston on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 830th most-seen of the 1200 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Azure Bluet in Boston on a given day, so our monthly data shows no clear season.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Azure Bluet 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 5 cities where we can rate Azure Bluet sightings, Boston ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in New York City (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Azure Bluet is recorded against all the insects logged in Boston (8 verified sightings), 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.
