Parrhasius m-album
In 3 days ~10% in a week ~30%
Parrhasius m-album, or the white M hairstreak, is a species of butterfly of the family Lycaenidae. It is found in the United States from western Connecticut to southeast Iowa, southern Missouri to east Texas, the Gulf Coast, and peninsular Florida. On rare occasions some stray to Michigan and Wisconsin.
The wings are often iridescent near the bottom. The females are larger than the males in this species. The wingspan of Parrhasius m-album is 32–41 mm. The larvae feed on Quercus virginiana and other Quercus species. the larvae appear a light green color. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | Philadelphia | 🇺🇸 United States | |
| 3 | New York City | 🇺🇸 United States | |
| 4 | Dallas | 🇺🇸 United States | |
| 5 | Boston | 🇺🇸 United States | |
| 6 | Houston | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a White M Hairstreak sighting in Great Smoky Mountains National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 441st most-seen of the 822 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.
March–April, June–July and October
In those months about 10% of wildlife watchers report a White M Hairstreak in Great Smoky Mountains National Park on a given day, against under 5% in May, August–September and November–February, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most White M Hairstreak sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate White M Hairstreak sightings, Great Smoky Mountains National Park ranks 2nd at under 5%. The best odds are in Shenandoah National Park (United States, about 10%).
Same family: Lycaenidae
The closest relatives of the White M Hairstreak that you can see in Great Smoky Mountains National Park (family Lycaenidae, Gossamer-winged Butterflies) are Elkalyce comyntas (about 20%), Cyaniris neglecta (about 20%) and Red-Banded Hairstreak (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the White M Hairstreak is recorded against all the insects logged in Great Smoky Mountains National Park (10 verified sightings from 2019 to 2026), 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.
