Bombus appositus
In 3 days ~30% in a week ~60%
Bombus appositus is a species of bumblebee known commonly as the white-shouldered bumblebee. It is native to western North America, including western Canada and the western United States. This species lives in open habitat, such as meadows and slopes. It nests underground or on the surface. Males congregate to seek mates. It feeds on a variety of plant taxa, including giant hyssops, thistles, gentians, owl's clovers, locoweeds, penstemons, and clovers. It especially favors subalpine larkspur (Delphinium barbeyi) and it serves as one of the plant's main pollinators.
This species has a range from southwestern Canada south to the Cascade Mountains and the Sierra Nevada, and west to central California. This species is a host to Bombus insularis, a species of cuckoo bumblebee. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Grand Teton National Park | 🇺🇸 United States | |
| 2 | Rocky Mountain National Park | 🇺🇸 United States | |
| 3 | Glacier National Park | 🇺🇸 United States | |
| 4 | Olympic National Park | 🇺🇸 United States | |
| 5 | Banff National Park | 🇨🇦 Canada | |
| 6 | Yellowstone National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Denver | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a White-Shouldered Bumble Bee sighting in Grand Teton National Park on a given day, based on 29 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 48th most-seen of the 140 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.
June
In that month about 20% of wildlife watchers report a White-Shouldered Bumble Bee in Grand Teton National Park on a given day, against under 5% in October to May, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most White-Shouldered Bumble Bee 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 6 parks where we can rate White-Shouldered Bumble Bee sightings, Grand Teton National Park has the highest daily chance: about 10%. Next come Rocky Mountain National Park (United States, about 10%) and Glacier National Park (United States, about 10%).
Same genus: Bombus
The closest relatives of the White-Shouldered Bumble Bee that you can see in Grand Teton National Park (genus Bombus, Bumble Bees) are Vancouver Bumble Bee (about 20%), Nevada Bumble Bee (about 10%) and Red-Belted Bumble Bee (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the White-Shouldered Bumble Bee is recorded against all the insects logged in Grand Teton National Park (29 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.
