Feniseca tarquinius
In 3 days ~10% in a week ~30%
Feniseca tarquinius, the harvester, is a butterfly of the family Lycaenidae, and the only member of the monotypic genus Feniseca. It is found in eastern North America. As a member of the subfamily Miletinae, this butterfly is entirely carnivorous (specifically insectivorous), making it the only obligate carnivore butterfly in North America. The larvae feed on various aphids, such as Neoprociphilus, Pemphigus, Prociphilus, and Schizoneura.
It is found in early spring until fall and is generally scarce. It lives in wooded areas near streams close to alders. The wingspan is 23–32 mm. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States | |
| 3 | Acadia National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Toronto | 🇨🇦 Canada | |
| 2 | Philadelphia | 🇺🇸 United States | |
| 3 | New York City | 🇺🇸 United States | |
| 4 | Chicago | 🇺🇸 United States | |
| 5 | Washington | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Harvester sighting in Shenandoah National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 630th most-seen of the 723 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.
May and June
In those months about 10% of wildlife watchers report a Harvester in Shenandoah National Park on a given day, against under 5% in July to April, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Harvester sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 3
Of the 3 parks where we can rate Harvester sightings, Shenandoah National Park ranks 2nd at under 5%. The best odds are in Great Smoky Mountains National Park (United States, about 10%).
Same family: Lycaenidae
The closest relatives of the Harvester that you can see in Shenandoah National Park (family Lycaenidae, Gossamer-winged Butterflies) are Elkalyce comyntas (about 20%), American Copper (about 20%) and Cyaniris neglecta (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Harvester is recorded against all the insects logged in Shenandoah National Park (7 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.
