Bombus sandersoni - Franklin, 1913
Sanderson Bumble Bee
Synonym(s): Bombus (Pyrobombus) sandersoni Franklin, 1913
Taxonomic Status: Accepted
Related ITIS Name(s): Bombus sandersoni Franklin, 1913 (TSN 714834)
Unique Identifier: ELEMENT_GLOBAL.2.744951
Element Code: IIHYM24310
Informal Taxonomy: Animals, Invertebrates - Insects - Bumble Bees
 
Kingdom Phylum Class Order Family Genus
Animalia Mandibulata Insecta Hymenoptera Apidae Bombus
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Concept Reference
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Concept Reference: Williams, P. H. 2008a. Bombus, bumblebees of the world. Web pages based on Williams, P.H. 1998. An annotated checklist of bumblebees with an analysis of patterns of description (Hymenoptera: Apidae, Bombini). Bulletin of the Natural History Museum (Entomology) 67:79-152. Online. Available: http://www.nhm.ac.uk/research-curation/research/projects/bombus/index.html. Accessed 2008-Oct.
Concept Reference Code: W08WIL01EHUS
Name Used in Concept Reference: Bombus (Pyrobombus) sandersoni
Taxonomic Comments: Subgenus: Pyrobombus.
Conservation Status
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NatureServe Status

Global Status: G4G5
Global Status Last Reviewed: 26Mar2010
Global Status Last Changed: 26Mar2010
Rounded Global Status: G4 - Apparently Secure
Reasons: While this bumblebee has a more limited climatic range than most, and so could be impacted more than most by climate change (Williams and Osbourne, 2009, Williams et al., 2009), there are no other known current threats. For now there is no evidence of decline and it appears to be common in places like Vermont and the Great Smoky Mountains. Other species in this subgenus are mostly doing well and some are increasing in Ontario (Colla and Packer, 2008) and Illinois (Grixti et al., 2009) although those studies were not in the range of B. sandersoni. This rank should be re-evaluated every few years, but for now the evidence is this bumblebee is stable and locally common near two ends of its range.
Nation: United States
National Status: N4N5 (21Jun2010)
Nation: Canada
National Status: N5 (22Jun2017)

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Maine (S3S5), Maryland (S3), Massachusetts (SNR), Michigan (SNR), Minnesota (SNR), New Hampshire (SNR), New York (S3S4), Pennsylvania (SH), Vermont (S4), Virginia (SU), Wisconsin (S1S3)
Canada British Columbia (SU), Labrador (S3S5), Manitoba (S5), New Brunswick (S5), Newfoundland Island (S4S5), Northwest Territories (SNR), Nova Scotia (SU), Ontario (S4S5), Prince Edward Island (SU), Quebec (SNR), Saskatchewan (S5)

Other Statuses

IUCN Red List Category: LC - Least concern

NatureServe Global Conservation Status Factors

Range Extent: 200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Range Extent Comments: The Bumblebee.org website gives the range as Ontario to Newfoundland, south to Tennessee and North Carolina, which is similar to actual specimen records found on the Discover Life website (visited 26 March 2010) except for Newfoundland. This bumblebee appears to have basically a tri-part range: Atlantic Canada and New England, near Lake Superior, and in the southern Appalachians. Records extend from Mt. Albert, Quebec and Cape Breton National Park, Nova Scotia southwest to Vermont (L. Richardson, pers. comm., 2008), western Massachusetts, and a bog in northwestern Connecticut; also in a very limited part of Ontario, northern Minnesota (Itasca State Pk.), and northern Michigan. In the mountains, populations occur in both Virginias, North Carolina, and Tennessee. This bee is especially well-studied in Great Smoky Mountains National Park. It may be especially widespread in Maine. Discover Life lists two specimen records that do not fall in any of these three areas, both from the Ohio State University collection: in Muskingum County, Ohio in 1985 and Jefferson County, Pennsylvania in 1968, neither of which is mountainous or within 100 km of the Great Lakes. Bombus sandersoni is not listed from New Jersey (Smith, 1910), New York (Leonard, 192#), southern Ontario (Colla and Packer, 2008) or Illinois (Grixti et al., 2009).

Number of Occurrences: > 300

Population Size: Unknown

Number of Occurrences with Good Viability/Integrity: Very many (>125)

Overall Threat Impact: Medium
Overall Threat Impact Comments: Threats would probably be mostly localized issues like pesticides or habitat loss for now. This species appears to have more limited climatic tolerance than most bumblebees based on its range, and so could be more affected by climatic warming than most. Introduced pathogens and parasites may not be an issue. This species was found to harbor a strain of Nosema bombi at Great Smoky Mountains National Park (Sokolova et al., 2010) but incidence was low (one of 16 individuals in 2002-2003) and species of subgenus Pyrobombus appear rather tolerant of such infection. It is also possible, as these authors suggest, that the Nosema strain they found is native and not introduced there although they could not distinguish it from European versions and declines of bumblebees in other subgenera have apparently occurred there.

Short-term Trend: Relatively Stable (<=10% change)
Short-term Trend Comments: Although recent studies of bumble bee decline in Illinois, Ontario, and out west are not in the range of this species. It is not reported by Xerces or others as declining, and most members of this subgenus that have been are either stable or increasing in such places. Sokolova et al. (2010) found 16 B. sandersoni among 93 Pyrobombus sampled in Great Smoky Mountains National Park near the southern end of the range in 2002-2003. This bee is still common where found in Vermont (L. Richardson).

Long-term Trend: Unknown

Intrinsic Vulnerability: Not intrinsically vulnerable

Environmental Specificity: Unknown

Other NatureServe Conservation Status Information

Distribution
Help
Global Range: (200,000-2,500,000 square km (about 80,000-1,000,000 square miles)) The Bumblebee.org website gives the range as Ontario to Newfoundland, south to Tennessee and North Carolina, which is similar to actual specimen records found on the Discover Life website (visited 26 March 2010) except for Newfoundland. This bumblebee appears to have basically a tri-part range: Atlantic Canada and New England, near Lake Superior, and in the southern Appalachians. Records extend from Mt. Albert, Quebec and Cape Breton National Park, Nova Scotia southwest to Vermont (L. Richardson, pers. comm., 2008), western Massachusetts, and a bog in northwestern Connecticut; also in a very limited part of Ontario, northern Minnesota (Itasca State Pk.), and northern Michigan. In the mountains, populations occur in both Virginias, North Carolina, and Tennessee. This bee is especially well-studied in Great Smoky Mountains National Park. It may be especially widespread in Maine. Discover Life lists two specimen records that do not fall in any of these three areas, both from the Ohio State University collection: in Muskingum County, Ohio in 1985 and Jefferson County, Pennsylvania in 1968, neither of which is mountainous or within 100 km of the Great Lakes. Bombus sandersoni is not listed from New Jersey (Smith, 1910), New York (Leonard, 192#), southern Ontario (Colla and Packer, 2008) or Illinois (Grixti et al., 2009).

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map
Endemism: occurs (regularly, as a native taxon) in multiple nations

U.S. & Canada State/Province Distribution
United States MA, MD, ME, MI, MN, NH, NY, PA, VA, VT, WI
Canada BC, LB, MB, NB, NF, NS, NT, ON, PE, QC, SK

Range Map
No map available.

Ecology & Life History Not yet assessed
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Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 26Mar2010
NatureServe Conservation Status Factors Author: Schweitzer, D.F.

Zoological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).

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