Aciurina bigeloviae
In 3 days ~60% in a week ~90%
Aciurina bigeloviae is a species of tephritid or fruit flies in the genus Aciurina of the family Tephritidae. It induces galls by laying an egg on the bud of a Ericameria nauseosa plant, which forms a gall that the larvae develops within through the fall.
Canada, United States. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Zion National Park | 🇺🇸 United States | |
| 2 | Grand Canyon National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Denver | 🇺🇸 United States |
Possible
About 20% of wildlife watchers report a Cotton-Gall Tephritid sighting in Grand Canyon National Park on a given day, based on 82 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 143 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
January and February
In those months about 40% of wildlife watchers report a Cotton-Gall Tephritid in Grand Canyon National Park on a given day, against about 10% in June to August, the lowest months. Those are among Grand Canyon National Park's wettest months, with about 30 mm of rain a month against almost none in June.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Cotton-Gall Tephritid 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 Cotton-Gall Tephritid sightings, Grand Canyon National Park ranks 2nd at about 20%. The best odds are in Zion National Park (United States, about 40%).
Same order: Diptera
The closest relatives of the Cotton-Gall Tephritid that you can see in Grand Canyon National Park (order Diptera, Flies) are Large-Tailed Aphideater (about 10%), Yellow-Shouldered Drone Fly (about 10%) and Spiny Tachina Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cotton-Gall Tephritid is recorded against all the insects logged in Grand Canyon National Park (82 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.
