Basiaeschna janata
In 3 days ~10% in a week ~20%
Basiaeschna janata, the springtime darner, is a species of dragonfly in the monotypic genus Basiaeshna in the family Aeshnidae. It is a small, bluish darner that flies early in the year. A fossil species, †Basiaeschna alaskaensis Garrouste & Nel, 2019 is known from the Chickaloon Formation of Alaska, around the time of the Paleocene-Eocene Thermal Maximum. It is the only definitive fossil member of this genus, and its presence in Alaska suggests that the ancestral Basiaeschna likely migrated from Eurasia to North America across Beringia. Two other fossil darner previously placed in this genus have been transferred into the extinct genus †Oligaeschna. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Springtime Darner sighting in Montreal on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 842nd most-seen of the 926 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 a Springtime Darner in Montreal on a given day, so our monthly data shows no clear season.
Yes
Of the 2 cities where we can rate Springtime Darner sightings, Montreal has the highest daily chance: under 5%. Next come Austin (United States, under 5%).
Same family: Aeshnidae
The closest relatives of the Springtime Darner that you can see in Montreal (family Aeshnidae, Darners) are Common Green Darner (about 10%) and Lance-Tipped Darner (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Springtime Darner is recorded against all the insects logged in Montreal (5 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.
