Aeshna walkeri
In 3 days ~10%
Aeshna walkeri, or Walker's darner, is a species of darner in the dragonfly family Aeshnidae. It is found in Central America and North America. The IUCN conservation status of Aeshna walkeri is "LC", least concern, with no immediate threat to the species' survival. The population is stable. The IUCN status was reviewed in 2017. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Walker's Darner sighting in San Francisco on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 416th most-seen of the 737 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Walker's Darner in San Francisco on a given day, so our monthly data shows no clear season.
Only San Francisco, in our data
San Francisco is the only city on Wallace's Line with enough records to rate Walker's Darner sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Aeshnidae
The closest relatives of the Walker's Darner that you can see in San Francisco (family Aeshnidae, Darners) are Blue-Eyed Darner (about 10%) and Common Green Darner (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Walker's Darner is recorded against all the insects logged in San Francisco (14 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.
