Idana marginata
In 3 days ~10% in a week ~20%
Idana is a monotypic genus of picture-winged flies, family Ulidiidae. The sole species is Idana marginata. Idana marginata is found in the United States and Canada. It is one of the largest ulidiid flies in eastern North America, reaching a length of over 10 mm (0.39 in). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | New York City | 🇺🇸 United States | |
| 2 | Toronto | 🇨🇦 Canada | |
| 3 | Washington | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Idana marginata sighting in New York City on a given day, based on 17 verified sightings from GBIF citizen-science data. It is the 740th most-seen of the 1623 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 Idana marginata in New York City on a given day, so our monthly data shows no clear season.
Yes
Of the 3 cities where we can rate Idana marginata sightings, New York City has the highest daily chance: under 5%. Next come Toronto (Canada, under 5%) and Washington (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Idana marginata is recorded against all the insects logged in New York City (17 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.
