Acanthocephala declivis
In 3 days ~20% in a week ~30%
Acanthocephala declivis, the giant leaf-footed bug, is a species of North American true bug with a range from the southern United States to El Salvador and some Caribbean islands. It is the largest of this genus within this range, generally growing to be 28 to 34 mm (1.1 to 1.3 in) long. It can be distinguished from similar species by its much more broadly expanding pronotum, which extends much further than the abdomen, and the blunt tubercles on the midline of the anterior pronotal lobe, which is not present in other Acantla species within its range.
One specific characteristic about Acanthocephala declivis is that sexual competition by males pertaining to this species depends on their hind leg dimorphism. They use their legs to squeeze other males when competing for sexual partners. The length and diameter of the large tooth and femur of their hind legs are noticeably larger than the rest of their bodies, proportionally speaking. Females, on the other hand, don’t have these exceptionally large hind legs, although they also use them for mating aggression. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Congaree National Park | 🇺🇸 United States | |
| 2 | Big Cypress National Preserve | 🇺🇸 United States | |
| 3 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 4 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Houston | 🇺🇸 United States | |
| 2 | Austin | 🇺🇸 United States | |
| 3 | Dallas | 🇺🇸 United States | |
| 4 | San Antonio | 🇺🇸 United States | |
| 5 | Orlando | 🇺🇸 United States | |
| 6 | Baltimore | 🇺🇸 United States | |
| 7 | Washington | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Giant Leaf-Footed Bug sighting in Shenandoah National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 363rd most-seen of the 723 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
January
In that month about 20% of wildlife watchers report a Giant Leaf-Footed Bug in Shenandoah National Park on a given day, against under 5% in February–August and November–December, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Giant Leaf-Footed Bug sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 4
Of the 4 parks where we can rate Giant Leaf-Footed Bug sightings, Shenandoah National Park ranks 4th at about 10%. The best odds are in Congaree National Park (United States, about 20%), Big Cypress National Preserve (United States, about 10%) and Great Smoky Mountains National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Giant Leaf-Footed Bug is recorded against all the insects logged in Shenandoah National Park (10 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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