Trimerotropis pallidipennis
In 3 days ~30% in a week ~60%
The pallid-winged grasshopper (Trimerotropis pallidipennis) is a common grasshopper of the family Acrididae, native to the deserts of western North America along with South America, ranging from British Columbia to Argentina. They are more active during the summer months, and their pale, mottled coloration makes them hard to see against surfaces such as the granite often found in the gravel of dry river beds. They grow to be 37 millimetres (1.5 in). The behavior of the pallid-winged grasshopper is apparently determined by temperature, with foraging occurring at temperatures of 24–32 °C (75–90 °F) and mating at 30–40 °C (86–104 °F).
Like many band-winged grasshoppers in the subfamily Oedipodinae, males perform crepitation flights, producing crackling sounds with their wings when disturbed or during courtship. Males also stridulate in courtship, rubbing the hind femur against the forewing to make a trilling sound.
Populations of the pallid-winged grasshopper occasionally irrupt to damaging numbers. Between 1952 and 1980, there were six outbreaks in Arizona, only one of which lasted more than one year. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Death Valley National Park | 🇺🇸 United States | |
| 2 | Joshua Tree National Park | 🇺🇸 United States | |
| 3 | Big Bend National Park | 🇺🇸 United States | |
| 4 | Saguaro National Park | 🇺🇸 United States | |
| 5 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 6 | Grand Canyon National Park | 🇺🇸 United States | |
| 7 | Channel Islands National Park | 🇺🇸 United States | |
| 8 | Zion National Park | 🇺🇸 United States | |
| 9 | Nahuel Huapi National Park | 🇦🇷 Argentina |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mesa | 🇺🇸 United States | |
| 2 | Las Vegas | 🇺🇸 United States | |
| 3 | Phoenix | 🇺🇸 United States | |
| 4 | Ciudad Juárez | 🇲🇽 México | |
| 5 | La Paz | 🇧🇴 Bolivia | |
| 6 | Los Angeles | 🇺🇸 United States | |
| 7 | Salt Lake City | 🇺🇸 United States | |
| 8 | Sacramento | 🇺🇸 United States | |
| 9 | San Diego | 🇺🇸 United States | |
| 10 | Torreón | 🇲🇽 México |
With luck
About 10% of wildlife watchers report a Pallid-Winged Grasshopper sighting in Zion National Park on a given day, based on 17 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 28th most-seen of the 114 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
March and May–June
In those months about 20% of wildlife watchers report a Pallid-Winged Grasshopper in Zion National Park on a given day, against under 5% in August–October and December–February, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Pallid-Winged 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.
8th of 9
Of the 9 parks where we can rate Pallid-Winged Grasshopper sightings, Zion National Park ranks 8th at about 10%. The best odds are in Death Valley National Park (United States, about 40%), Joshua Tree National Park (United States, about 30%) and Big Bend National Park (United States, about 20%).
Same family: Acrididae
The closest relatives of the Pallid-Winged Grasshopper that you can see in Zion National Park (family Acrididae, Short-horned Grasshoppers) are Green Bird Grasshopper (about 20%), Yarrow's Grasshopper (about 10%) and Speckle-Winged Rangeland Grasshopper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pallid-Winged Grasshopper is recorded against all the insects logged in Zion National Park (17 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.
