Aeropedellus clavatus
In 3 days ~10% in a week ~30%
Aeropedellus clavatus, the club-horned grasshopper, is a species of slant-faced grasshopper in the family Acrididae. It is found in North America, from western Canada to the southwestern United States. It hatches in early spring.
Adult club-horned grasshoppers are light brown, grey, or green, with black or silver markings. The species is named for their clavate (club-shaped) antennae, whose last six segments are larger and darker than the rest. A dark streak runs from the bottom of the compound eye to the base of the mandible, accompanied by a cream or light tan stream further forward. There is often a pale diagonal mark on the vertical sides of pronotum. There are median and lateral carinae (ridges) on the pronotum, cut by a groove behind the middle. The lateral carinae constrict near the middle of the prozona (the forewing-covering section of the pronotum), forming an hourglass-shaped marking, which is common among slant-faced grasshoppers. There are two oblong lateral fovolae (indentations) on the top of the head. The hind wing is clear, and the hind tibia is light brown.
The adult female has short wings that do not reach the middle of her abdomen... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rocky Mountain National Park | 🇺🇸 United States | |
| 2 | Yellowstone National Park | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Club-Horned Grasshopper sighting in Yellowstone National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 127th most-seen of the 160 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.
June
In that month about 10% of wildlife watchers report a Club-Horned Grasshopper in Yellowstone National Park on a given day, against under 5% in July to May, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Club-Horned Grasshopper sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Club-Horned Grasshopper sightings, Yellowstone National Park ranks 2nd at under 5%. The best odds are in Rocky Mountain National Park (United States, about 10%).
Same family: Acrididae
The closest relatives of the Club-Horned Grasshopper that you can see in Yellowstone National Park (family Acrididae, Short-horned Grasshoppers) are Two-Striped Grasshopper (about 10%), Clear-Winged Grasshopper (about 10%) and Crackling Forest Grasshopper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Club-Horned Grasshopper is recorded against all the insects logged in Yellowstone National Park (5 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.
