Alcaeorrhynchus grandis
In 3 days ~30% in a week ~50%
Alcaeorrhynchus grandis is a species of the family Pentatomidae. Also known as giant strong-nosed stink bug, Alcaeorrhynchus grandis can be found through Brazil, Colombia, Mexico, and the southern United States. As a predator, this stink bug can follow frass trails created by prey. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Congaree National Park | 🇺🇸 United States | |
| 2 | Galápagos Islands | 🇪🇨 Ecuador |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | São Paulo | 🇧🇷 Brazil | |
| 2 | Buenos Aires | 🇦🇷 Argentina | |
| 3 | Houston | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Giant Strong-Nosed Stink Bug sighting in Galápagos Islands on a given day, based on 58 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 19th most-seen of the 83 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
May
In that month about 30% of wildlife watchers report a Giant Strong-Nosed Stink Bug in Galápagos Islands on a given day, against under 5% in July–October and December–February, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Giant Strong-Nosed Stink Bug sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Giant Strong-Nosed Stink Bug sightings, Galápagos Islands ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Congaree National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Giant Strong-Nosed Stink Bug is recorded against all the insects logged in Galápagos Islands (58 verified sightings from 2019 to 2026), 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.
