Stictocephala diceros
In 3 days ~10% in a week ~20%
Stictocephala diceros, the two-horned treehopper, is a species of hemipteran insect within the family Membracidae. The species range includes much of eastern North America, which includes southeastern Canada in areas adjacent the United States border and US state regions such as the Midwest, Northeast, Southeast, as well as some western states such as Utah, Colorado, and New Mexico. The species inhabits temperate and hardwood forests, where it primarily feeds on American black elderberry, although its known to feed on other flowering plants such as those in the Asteraceae, Fabaceae, Fagaceae, and Rosaceae families. The species reaches 8 to 9 millimeters in length with a brown coloration. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Toronto | 🇨🇦 Canada | |
| 2 | Montreal | 🇨🇦 Canada | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Chicago | 🇺🇸 United States | |
| 5 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Two-Horned Treehopper sighting in Chicago on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 669th most-seen of the 978 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Two-Horned Treehopper in Chicago on a given day, so our monthly data shows no clear season.
Among the best
Of the 5 cities where we can rate Two-Horned Treehopper sightings, Chicago ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Toronto (Canada, under 5%), Montreal (Canada, under 5%) and Boston (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Two-Horned Treehopper is recorded against all the insects logged in Chicago (9 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.
