Enallagma durum
In 3 days ~10% in a week ~20%
Enallagma durum, the big bluet, is a species of narrow-winged damselfly in the family Coenagrionidae. It is found in northern Mexico and southern and eastern United States. The IUCN conservation status of Enallagma durum is "least concern", with no immediate threat to the species' survival. The
population is stable. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Philadelphia | 🇺🇸 United States | |
| 2 | Orlando | 🇺🇸 United States | |
| 3 | Washington | 🇺🇸 United States | |
| 4 | Miami | 🇺🇸 United States | |
| 5 | Boston | 🇺🇸 United States | |
| 6 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Big Bluet sighting in Philadelphia on a given day, based on 25 verified sightings from GBIF citizen-science data. It is the 296th most-seen of the 632 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.
August
In that month about 10% of wildlife watchers report a Big Bluet in Philadelphia on a given day, against under 5% in September to July, the lowest months.
Yes
Of the 6 cities where we can rate Big Bluet sightings, Philadelphia has the highest daily chance: under 5%. Next come Orlando (United States, under 5%) and Washington (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Big Bluet is recorded against all the insects logged in Philadelphia (25 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.
