Rhopalomyia pomum
In 3 days ~20% in a week ~50%
Rhopalomyia pomum, the sponge gall midge, is a species of gall midges, insects in the family Cecidomyiidae. The midges form leaf galls on Great Basin sagebrush (Artemisia tridentata). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Grand Teton National Park | 🇺🇸 United States | |
| 2 | Yellowstone National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Salt Lake City | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Sponge Gall Midge sighting in Grand Teton National Park on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 67th most-seen of the 140 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
June
In that month about 20% of wildlife watchers report a Sponge Gall Midge in Grand Teton National Park on a given day, against under 5% in July to April, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Sponge Gall Midge sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Sponge Gall Midge sightings, Grand Teton National Park has the highest daily chance: about 10%. Next come Yellowstone National Park (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Sponge Gall Midge is recorded against all the insects logged in Grand Teton National Park (13 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.
