Prosapia bicincta
In 3 days ~40% in a week ~70%
Prosapia bicincta, the two-lined spittlebug, is a species of insect in the family Ischnorhinidae (formerly Cercopidae). Adults are black with two red or orange lines crossing the wings. It reaches a length of 8–10 mm. It is widespread in the eastern half of the United States. A similar species, Prosapia simulans, can be found throughout Central America where it is considered an agricultural pest.
Nymphs feed on various grasses (including centipedegrass, bermudagrass and corn) from within foam (consisting of their own spittle) produced from juices of their host plant. Adults feed on the leaves of both native and introduced species of holly, as well as on the leaves of the eastern redbud tree. It is a pest of forage grasses and turf grasses such as those grown for lawns and its consumption of these plants causes economic damage throughout the southeastern United States.
Since 2016, P. bicincta has been associated with dying patches of pasture on the island of Hawaiʻi. By 2022, the distribution of the infestation had expanded, reached more than 70,000 ha and had caused serious, widespread and long-term damage to large areas of rangelands and pastures on the island. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Big Cypress National Preserve | 🇺🇸 United States | |
| 3 | Shenandoah National Park | 🇺🇸 United States | |
| 4 | Everglades National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | Dallas | 🇺🇸 United States | |
| 3 | Austin | 🇺🇸 United States | |
| 4 | Baltimore | 🇺🇸 United States | |
| 5 | Houston | 🇺🇸 United States | |
| 6 | Miami | 🇺🇸 United States | |
| 7 | Philadelphia | 🇺🇸 United States | |
| 8 | New York City | 🇺🇸 United States | |
| 9 | San Antonio | 🇺🇸 United States |
Possible
About 20% of wildlife watchers report a Two-Lined Spittlebug sighting in Great Smoky Mountains National Park on a given day, based on 89 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 55th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
July
In that month about 30% of wildlife watchers report a Two-Lined Spittlebug in Great Smoky Mountains National Park on a given day, against under 5% in November to May, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Two-Lined Spittlebug sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Yes
Of the 4 parks where we can rate Two-Lined Spittlebug sightings, Great Smoky Mountains National Park has the highest daily chance: about 20%. Next come Big Cypress National Preserve (United States, about 20%) and Shenandoah National Park (United States, about 10%).
Same order: Hemiptera
The closest relatives of the Two-Lined Spittlebug that you can see in Great Smoky Mountains National Park (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Hemlock Woolly Adelgid (about 20%), Kudzu Bug (about 20%) and Acanthocephala terminalis (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Two-Lined Spittlebug is recorded against all the insects logged in Great Smoky Mountains National Park (89 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.
