Urocerus flavicornis
In 3 days ~10% in a week ~30%
Urocerus flavicornis, the yellow-horned horntail wasp, is a species of horntail native to North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jasper National Park | 🇨🇦 Canada | |
| 2 | Banff National Park | 🇨🇦 Canada | |
| 3 | Rocky Mountain National Park | 🇺🇸 United States | |
| 4 | Great Bear Rainforest | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Yellow-Horned Horntail sighting in Rocky Mountain National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 125th most-seen of the 191 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.
July and August
In those months about 10% of wildlife watchers report a Yellow-Horned Horntail in Rocky Mountain National Park on a given day, against under 5% in September to June, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Yellow-Horned Horntail sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 4 parks where we can rate Yellow-Horned Horntail sightings, Rocky Mountain National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Jasper National Park (Canada, about 10%) and Banff National Park (Canada, about 10%).
Same order: Hymenoptera
The closest relatives of the Yellow-Horned Horntail that you can see in Rocky Mountain National Park (order Hymenoptera, Ants, Bees, Wasps, and Sawflies) are Hunt's Bumble Bee (about 10%), Nevada Bumble Bee (about 10%) and Colorado Black-Notched Bumble Bee (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-Horned Horntail is recorded against all the insects logged in Rocky Mountain National Park (9 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.
