Graphocephala fennahi
In 3 days ~30% in a week ~50%
Graphocephala fennahi (rhododendron leafhopper) is a species of leafhopper native to the United States. Its common name derives from it feeding on the sap of rhododendrons. The species was introduced to Great Britain in the 1930s and continental Europe in the 1970s. They possibly contribute to the spread of the rhododendron fungus (Pycnostysanus azaleae) through Europe.
Adults possess green wings with purple tips which each feature two orange stripes. Their heads, undersides and legs are yellow, and they have a purple stripe across the top of their heads, extending over the eyes. Males are 7.4-8.8 mm (about 0.35 in) long, and females are a little larger, around 8.2–9 mm (about 0.35 in). Nymphs are light yellow and wingless.
They move by jumping or, as adults, flying short distances. When disturbed, they quickly jump away. Skin sheds of the leafhopper can be found on the underside of leaves. They are related to cicadas, spittlebugs, and treehoppers. They feed on the sap from rhododendron plants by sucking it out with a proboscis.
They are recorded in grassy lands, brushy habitats, and mixed hardwood forests, usually found in areas with rhododendron... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 3 | Acadia National Park | 🇺🇸 United States | |
| 4 | Shenandoah National Park | 🇺🇸 United States | |
| 5 | Wadden Sea National Park | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Rhododendron Leafhopper sighting in Great Smoky Mountains National Park on a given day, based on 51 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 113th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Rhododendron Leafhopper in Great Smoky Mountains National Park on a given day, against under 5% in December to April, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Rhododendron Leafhopper sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 5 parks where we can rate Rhododendron Leafhopper sightings, Great Smoky Mountains National Park has the highest daily chance: about 10%. Next come Bavarian Forest National Park (Germany, about 10%) and Acadia National Park (United States, about 10%).
Same genus: Graphocephala
The closest relatives of the Rhododendron Leafhopper that you can see in Great Smoky Mountains National Park (genus Graphocephala) are Versute Sharpshooter (about 10%) and Red-Banded Leafhopper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rhododendron Leafhopper is recorded against all the insects logged in Great Smoky Mountains National Park (51 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.
