Lethocerus medius
In 3 days ~10% in a week ~20%
Lethocerus medius is a species of giant water bug in the family Belostomatidae. It is found in Central America from northern Panama north throughout Mexico to southern Arizona, New Mexico, and Texas in the United States, and Cuba, Jamaica, the Cayman Islands, and the Bahamas.
They grow up to 49–58 mm for males and 62–63 mm of females. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Bend National Park | 🇺🇸 United States | |
| 2 | Saguaro National Park | 🇺🇸 United States | |
| 3 | Cumbres de Monterrey National Park | 🇲🇽 Mexico |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Monterrey | 🇲🇽 México | |
| 2 | San Antonio | 🇺🇸 United States | |
| 3 | Austin | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Lethocerus medius sighting in Cumbres de Monterrey National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 304th most-seen of the 431 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.
February and November–December
In those months about 10% of wildlife watchers report a Lethocerus medius in Cumbres de Monterrey National Park on a given day, against under 5% in January and March–October, the lowest months. Those are among Cumbres de Monterrey National Park's driest months, with about 35 mm of rain a month against 180 mm in September.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Lethocerus medius sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
3rd of 3
Of the 3 parks where we can rate Lethocerus medius sightings, Cumbres de Monterrey National Park ranks 3rd at under 5%. The best odds are in Big Bend National Park (United States, about 10%) and Saguaro National Park (United States, under 5%).
Same order: Hemiptera
The closest relatives of the Lethocerus medius that you can see in Cumbres de Monterrey National Park (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Acanthocephala alata (about 10%), Giant Cicada (about 10%) and Red-Shouldered Bug (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Lethocerus medius is recorded against all the insects logged in Cumbres de Monterrey National Park (7 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.
