Bombus sandersoni

Franklin, 1913

Sanderson bumblebee, Sanderson's Bumble Bee

Bombus sandersoni is a North American bumblebee native to Canada and the eastern United States. It occupies diverse including maritime regions, temperate forests, prairies, tundra, and taiga. The species nests underground and has been documented visiting multiple flowering plant . It is currently not considered to be experiencing significant declines, though it may be more sensitive to climate change than some other bumblebee species. It has been found to harbor the microsporidian Nosema bombi.

Bombus sandersoni by (c) Louis Imbeau, some rights reserved (CC BY), uploaded by Louis Imbeau. Used under a CC-BY license.

Bombus (Pyrobombus) sandersoni by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Bombus sandersoni: //ˈbɒm.bəs ˌsænˈdɜːr.sə.naɪ//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The combination of black body with yellow abdominal markings and pale hairs distinguishes this from many other Bombus. can be recognized by the black abdominal tip, which differs from the 's more uniformly yellow . Males have notably long hairs compared to other . Accurate identification may require examination of morphological details such as cheek length and color pattern specifics, as coloration overlaps with other species in the subgenus Pyrobombus.

Images

Habitat

Occurs in maritime Canada, temperate forest, Canadian Prairies, tundra, and taiga. Strongly associated with wooded areas and forest edges. Nests underground.

Distribution

Native to North America; occurs across Canada and in the eastern United States. Distribution records also indicate presence in South America, though this may reflect data errors or vagrant occurrences rather than established .

Diet

Feeds on nectar and pollen from multiple plant including Caulophyllum (cohosh), Chamaenerion (fireweeds), Kalmia, Lonicera (honeysuckles), Monarda (bergamot), Rubus (blackberries), and Vaccinium (bilberries).

Life Cycle

Eusocial colony cycle with , , and male . Nests underground. Specific details of colony founding, development timing, and are not well documented in available sources.

Behavior

Underground nesting . Foraging activity has been observed on diverse flowering plants. No other specific behavioral details are documented in available sources.

Ecological Role

of wild flowering plants in forested and open . Contributes to pollination of understory and forest-edge vegetation across its broad geographic range.

Human Relevance

Not a major agricultural . Subject of conservation interest due to potential climate sensitivity. Documented of Nosema bombi, a of concern for bumblebee health research.

Similar Taxa

Bombus vagansOverlapping range and similar coloration; B. sandersoni has longer cheek and different abdominal hair pattern
Bombus ternariusSimilar yellow and black pattern; B. ternarius has distinct orange band on not present in B. sandersoni

More Details

Parasite load

Documented of Nosema bombi, a microsporidian implicated in bumblebee declines elsewhere. The significance of this for B. sandersoni health is not established.

Climate sensitivity

May be more sensitive to climate change than other bumblebee , based on comparative assessments, though specific mechanisms are not documented.