Trimerotropis pallidipennis
In 3 days ~80% in a week >90%
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 |
Likely
About 40% of wildlife watchers report a Pallid-Winged Grasshopper sighting in Death Valley National Park on a given day, based on 141 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 108 insects we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
November
In that month about 70% of wildlife watchers report a Pallid-Winged Grasshopper in Death Valley National Park on a given day, against about 30% in March–July and September, the lowest months. That is one of Death Valley National Park's driest months, with about 10 mm of rain against 30 mm in March.
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.
Yes
Of the 9 parks where we can rate Pallid-Winged Grasshopper sightings, Death Valley National Park has the highest daily chance: about 40%. Next come 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 Death Valley National Park (family Acrididae, Short-horned Grasshoppers) are Alkali Grasshopper (about 20%) and Pale Clouded 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 Death Valley National Park (141 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.
