Uhler's Giant Water Bug

Uhler's Giant Water Bug

Lethocerus uhleri

Daily sighting probability <5% · Rare
at Merritt Island National Wildlife Refuge

In 3 days ~10% in a week ~30%

7 Verified sightings at Merritt Island National Wildlife Refuge From 2019 to 2026
17 In all 2 parks
May Best month
☀️🌙 Day & Night When it's spotted

About the Uhler's Giant Water Bug

Lethocerus uhleri, or Uhler's water bug, is a species of giant water bug in the family Belostomatidae. It is found in eastern North America from New York, Michigan, and Wisconsin south to Florida and northern Tamaulipas. Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Big Cypress National Preserve 🇺🇸 United States
~10%
2 Merritt Island National Wildlife Refuge 🇺🇸 United States
<5%

Cities Where Found

# City Country Daily sighting probability
1 Houston 🇺🇸 United States
<5%
2 Dallas 🇺🇸 United States
<5%

Before you go

What are the chances of seeing an Uhler's Giant Water Bug in Merritt Island National Wildlife Refuge?

Rare

Under 5% of wildlife watchers report an Uhler's Giant Water Bug sighting in Merritt Island National Wildlife Refuge on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 165th most-seen of the 189 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.

When is the best time to see an Uhler's Giant Water Bug in Merritt Island National Wildlife Refuge?

January and April–May

In those months about 10% of wildlife watchers report an Uhler's Giant Water Bug in Merritt Island National Wildlife Refuge on a given day, against under 5% in February–March and June–December, the lowest months.

What time of day is best to see an Uhler's Giant Water Bug?

Between 9 pm and midnight

Across all the parks we cover, that three-hour window holds the most Uhler's Giant Water Bug sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.

Is Merritt Island National Wildlife Refuge the best place to see an Uhler's Giant Water Bug?

2nd of 2

Of the 2 parks where we can rate Uhler's Giant Water Bug sightings, Merritt Island National Wildlife Refuge ranks 2nd at under 5%. The best odds are in Big Cypress National Preserve (United States, about 10%).

Which relatives of the Uhler's Giant Water Bug live in Merritt Island National Wildlife Refuge?

Same order: Hemiptera

The closest relatives of the Uhler's Giant Water Bug that you can see in Merritt Island National Wildlife Refuge (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Milkweed Assassin Bug (about 10%), Eastern Leaf-Footed Bug (about 10%) and North American Wheel Bug (about 10%), with each one's daily chance of a sighting.

Where does the Uhler's Giant Water Bug sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Uhler's Giant Water Bug is recorded against all the insects logged in Merritt Island National Wildlife Refuge (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.

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