Umbonia crassicornis
In 3 days ~30% in a week ~60%
Umbonia crassicornis, commonly known as the thorn bug, is a widespread member of the insect family Membracidae, and an occasional pest of ornamentals and fruit trees in southern Florida. The body length of the adult is approximately 10 millimetres (0.39 in). This is a variable species as to size, color and structure, particularly the pronotal horn of males (which is more angled posteriorly than the females' and often somewhat expanded apically). This tall, essentially perpendicular thornlike pronotum discourages birds and other predators from eating it, if only by mistakenly confusing it with a thorn. Typically, the adult is green or yellow with reddish lines and brownish markings.
The species is restricted to warmer climates where temperatures stay, on average, above zero. This limits the species to the tropical regions of Northern South America to Mexico and Florida. Any range of temperature below 0 degrees is fatal resulting in a 10-90 percent decrease in the population as temperature decreases. Its preferred hosts are ornamental and fruit trees of subtropical regions feeding on sap inside the plants.
Female Umbonia crassicornis often deposit... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Everglades National Park | 🇺🇸 United States | |
| 2 | La Amistad International Park (Panama) | 🇵🇦 Panama |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cali | 🇨🇴 Colombia | |
| 2 | Caracas | 🇻🇪 Venezuela | |
| 3 | Guadalajara | 🇲🇽 México | |
| 4 | Medellín | 🇨🇴 Colombia | |
| 5 | Miami | 🇺🇸 United States | |
| 6 | San José | 🇨🇷 Costa Rica | |
| 7 | Philadelphia | 🇺🇸 United States | |
| 8 | Mexico City | 🇲🇽 México |
With luck
About 10% of wildlife watchers report a Thorn Treehopper sighting in Guadalajara on a given day, based on 70 verified sightings from GBIF citizen-science data. It is the 17th most-seen of the 229 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
January and November
In those months about 20% of wildlife watchers report a Thorn Treehopper in Guadalajara on a given day, against under 5% in May, the lowest month. Those are among Guadalajara's driest months, with about 10 mm of rain a month against 210 mm in July.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Thorn Treehopper sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 8
Of the 8 cities where we can rate Thorn Treehopper sightings, Guadalajara ranks 3rd at about 10%. The best odds are in Cali (Colombia, about 20%) and Caracas (Venezuela, about 10%).
GBIF citizen-science records
It is estimated from how often the Thorn Treehopper is recorded against all the insects logged in Guadalajara (70 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.
