Fixsenia favonius
In 3 days ~10% in a week ~20%
Satyrium favonius, the oak hairstreak or southern hairstreak, is a butterfly of the family Lycaenidae. It is found in the United States from southern New England and the Atlantic Coast south to peninsular Florida and west to central Illinois, south-eastern Colorado and the Gulf Coast.
The wingspan is 22–38 mm. The larvae feed on the leaves, buds and male catkins of Quercus species. The species overwinters as an egg. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Merritt Island National Wildlife Refuge | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | Miami | 🇺🇸 United States | |
| 3 | San Antonio | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Oak Hairstreak sighting in Austin on a given day, based on 34 verified sightings from GBIF citizen-science data. It is the 657th most-seen of the 1624 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.
April and May
In those months about 10% of wildlife watchers report an Oak Hairstreak in Austin on a given day, against under 5% in June to March, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Oak Hairstreak sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 cities where we can rate Oak Hairstreak sightings, Austin has the highest daily chance: under 5%. Next come Miami (United States, under 5%) and San Antonio (United States, under 5%).
Same family: Lycaenidae
The closest relatives of the Oak Hairstreak that you can see in Austin (family Lycaenidae, Gossamer-winged Butterflies) are Gray Hairstreak (about 30%), Reakirt's Blue (about 10%) and Ceraunus Blue (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Oak Hairstreak is recorded against all the insects logged in Austin (34 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.
