Corythucha ciliata
In 3 days ~10% in a week ~30%
Corythucha ciliata, the sycamore lace bug, is a species of lace bug in the family Tingidae that is associated with sycamore trees. It's also known as the plane lace bug due to its association with the London plane (Platanus × hispanica).
It originates in the New World, but has been introduced and has spread in Europe. It is a small, whitish insect and feeds on the underside of the leaves, sucking sap. There are reports in Europe of C. cilata landing on people and biting them. Reports from Italy, France and Romania indicate that some people experience adverse reactions, e.g., dermatosis.
The adult sycamore lace bug is milky white in colour and between 3.2 and 3.7 mm (0.13 and 0.15 in) in length. It is similar in appearance to the cotton lace bug (Corythucha gossypii) and the Florida oak lace bug (Corythucha floridana), but lacks the brown crescent-shaped band on the carina (ridge on the body-wall) of the former and is larger than the latter. The only brown colour is a small spot on the protuberance on each elytron (wing-case). The nymphs are oval in shape, dorso-ventrally flattened, black and prickly. This lace bug can most easily be distinguished from other species... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Pyrénées National Park | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report an Eastern Sycamore Lace Bug sighting in Seoul on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 248th most-seen of the 525 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.
June–July, September and November
In those months about 10% of wildlife watchers report an Eastern Sycamore Lace Bug in Seoul on a given day, against under 5% in August, October and December–May, the lowest months. Those are among Seoul's wettest months, with about 170 mm of rain a month against 20 mm in January.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Eastern Sycamore Lace Bug sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
21st of 29
Of the 29 cities where we can rate Eastern Sycamore Lace Bug sightings, Seoul ranks 21st at under 5%. The best odds are in Paris (France, about 20%), Hefei (China, about 20%) and Budapest (Hungary, about 10%).
GBIF citizen-science records
It is estimated from how often the Eastern Sycamore Lace Bug is recorded against all the insects logged in Seoul (11 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.
