Japananus hyalinus
In 3 days ~10% in a week ~20%
Japananus hyalinus, the Japanese maple leafhopper, is a species of leafhopper of the subfamily Deltocephalinae and tribe Opsiini (formerly placed in tribe Scaphytopiini). Believed to be native to eastern Asia, it has been carried with the trade in cultivated maples and is now widely found in Europe, North America and Australia.
Female 5.5 mm long (even 6.5 mm), male 4.25 mm. Head comes to an acute point, head and prothorax greenish yellow. Forewings translucent with reddish veins (paler in male). In the resting position three narrow beaded bands of purplish brown run more or less straight across the wings, incorporating some portions of the veins.
The eggs are inserted into the nodes of young branches, making them very difficult to detect in dormant planting stock. There is normally one generation per year (two in Italy), with the eggs over wintering. The nymphs are sharply pointed at both head and tail and are frequently yellowish.
The species was first described (as Platymetopius hyalinus) by Herbert Osborn in 1900, from specimens taken in Washington, D.C. Since it was unlikely that a native species would have remained undetected so long... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Japanese Maple Leafhopper sighting in Vienna on a given day, based on 17 verified sightings from GBIF citizen-science data. It is the 666th most-seen of the 1406 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
July and August
In those months about 10% of wildlife watchers report a Japanese Maple Leafhopper in Vienna on a given day, against under 5% in September to June, the lowest months. Those are among Vienna's wettest months, with about 85 mm of rain a month against 40 mm in February.
11th of 24
Of the 24 cities where we can rate Japanese Maple Leafhopper sightings, Vienna ranks 11th at under 5%. The best odds are in Berlin (Germany, about 10%), Auckland (New Zealand, about 10%) and Bucharest (Romania, about 10%).
Same family: Cicadellidae
The closest relatives of the Japanese Maple Leafhopper that you can see in Vienna (family Cicadellidae, Typical Leafhoppers) are Zygina nivea (about 10%), Penthimia nigra (about 10%) and Ribautiana debilis (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Japanese Maple Leafhopper is recorded against all the insects logged in Vienna (17 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.
