Silhouette: Michael Day · PhyloPic
Thecla iroides
In 3 days ~10%
Callophrys augustinus, the brown elfin, is a species of butterfly of the family Lycaenidae, found from Alaska to northern Mexico. One of its subspecies, C. augustinus iroides, is known as the western elfin. This species was first collected by John Richardson in 1827. The specific epithet, augustinus, was chosen in honor of Inuit interpreter Tatannuaq, who was also known as Augustus.
It is found from Newfoundland north and west through the northern United States and the prairie provinces to Alaska. To the south it ranges in Appalachian Mountains to northern Georgia and northern Alabama, further south through the western mountains to northern Baja California in Mexico.
The larvae feed... 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 Thecla iroides sighting in San Francisco on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 679th 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 Thecla iroides 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 Thecla iroides sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Lycaenidae
The closest relatives of the Thecla iroides that you can see in San Francisco (family Lycaenidae, Gossamer-winged Butterflies) are Gray Hairstreak (about 10%), Acmon Blue (about 10%) and Western Pygmy-Blue (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Thecla iroides is recorded against all the insects logged in San Francisco (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.
