Incisalia henrici
In 3 days ~10% in a week ~30%
Callophrys henrici, the Henry's elfin or woodland elfin, is a North American butterfly in the family Lycaenidae. In Canada it is found from southern Manitoba to southern Nova Scotia. It has two main groups of populations in the United States; the first is found along the Atlantic Coast and uses various hollies (Ilex) as host plants; and the second is found mainly in the north and the Appalachians where they use redbud (Cercis canadensis) as a host plant. Henry's elfin is increasing in New England because of an introduced buckthorn (Rhamnus cathartica) it now uses as a host plant. It is listed as a species of special concern in the US state of Connecticut.
The upperside of the wings is a dark brown color. The underside of the wings is strongly two toned with the basal area being dark brown black. The hindwing postmedian line has white at both ends. The outer edge of the hindwing is frosted and the outer edge of the forewing is sometimes green toned. The hindwing has tails that are short and stubby. In the southeast, these tails are longer. The male lacks a stigma. Henry's elfin's wingspan measures 20 to 25 mm (0.79 to 0.98 in)
Similar species... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Bend National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | San Antonio | 🇺🇸 United States | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Dallas | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Henry's Elfin sighting in San Antonio on a given day, based on 51 verified sightings from GBIF citizen-science data. It is the 241st most-seen of the 697 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
February and March
In those months about 10% of wildlife watchers report a Henry's Elfin in San Antonio on a given day, against under 5% in April to January, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Henry's Elfin sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 4
Of the 4 cities where we can rate Henry's Elfin sightings, San Antonio ranks 2nd at under 5%. The best odds are in Austin (United States, about 10%).
Same family: Lycaenidae
The closest relatives of the Henry's Elfin that you can see in San Antonio (family Lycaenidae, Gossamer-winged Butterflies) are Gray Hairstreak (about 20%), Reakirt's Blue (about 20%) and Ceraunus Blue (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Henry's Elfin is recorded against all the insects logged in San Antonio (51 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.
