Jadera haematoloma
In 3 days ~20% in a week ~40%
Jadera haematoloma, the red-shouldered bug, goldenrain-tree bug or soapberry bug is a species of true bug that lives throughout the United States and south to northern South America. It feeds on seeds within the soapberry plant family, Sapindaceae, and is known to rapidly adapt to feeding on particular hosts. The species is often confused with boxelder bugs and lovebugs.
Jadera haematoloma are typically 9.5–13.5 millimetres (0.37–0.53 in) long and 3–4 millimetres (0.12–0.16 in) wide, though the short-winged form (brachyptera) usually is 7–8 millimetres (0.28–0.31 in) long. Color is mostly blackish (sometimes, bluish grey, or purplish, or bright red immediately after molting) except for red eyes, "shoulders" (lateral margins of pronotum), and costal margins and dorsal part of abdomen. Nymphs are mostly red with a black pronotum and wingpads. All appendages are blackish.
For most of the twentieth century, little was known about the range of J. haematoloma. Reports showed breeding populations to be present in Florida, Kansas, Colorado, Texas, Arizona, California, Alabama, Illinois, North Carolina, Missouri, Iowa, as well as Georgia, South Carolina... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Everglades National Park | 🇺🇸 United States | |
| 2 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 3 | Padre Island National Seashore | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Monterrey | 🇲🇽 México | |
| 2 | Los Angeles | 🇺🇸 United States | |
| 3 | Tainan | 🇹🇼 Taiwan | |
| 4 | San Diego | 🇺🇸 United States | |
| 5 | Ciudad Juárez | 🇲🇽 México | |
| 6 | Dallas | 🇺🇸 United States | |
| 7 | Orlando | 🇺🇸 United States | |
| 8 | Austin | 🇺🇸 United States | |
| 9 | Denver | 🇺🇸 United States | |
| 10 | Washington | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Red-Shouldered Bug sighting in Washington on a given day, based on 1,334 verified sightings from GBIF citizen-science data. It is the 106th most-seen of the 1807 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
August to May
In those months about 10% of wildlife watchers report a Red-Shouldered Bug in Washington on a given day, against under 5% in June and July, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Red-Shouldered Bug sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 21 cities where we can rate Red-Shouldered Bug sightings, Washington ranks 10th at about 10%, level with the leaders once rounded. The best odds are in Monterrey (México, about 10%), Los Angeles (United States, about 10%) and Tainan (Taiwan, about 10%).
GBIF citizen-science records
It is estimated from how often the Red-Shouldered Bug is recorded against all the insects logged in Washington (1,334 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.
