Red List of Bees: Native Bees in Decline

The table below provides a summary of status and distribution of Xerces Society Red Listed bees of North America, with links to a profile for each species. The profiles include as much information as is known about their biology and conservation. For information about using the Red List, visit this page.
To view Red Lists for other invertebrates, click here.

Status Definitions Key

PE — Possibly Extinct: Missing; known from only historical occurrences, but still some hope of rediscovery.

CI — Critically Imperiled: At very high risk of extinction due to extreme rarity (often 5 or fewer populations), very steep declines, or other factors.

I — Imperiled: At high risk of extinction due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors.

V — Vulnerable: At moderate risk of extinction due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors.

DD — Data Deficient: Inadequate information to make an assessment of its risk category, either through lack of knowledge of population size, threats to it, or to taxonomic uncertainty of the validity of the taxon.

Scientific Name
Common Name
Red List Status
Canada
Mexico
USA
Andrena aculeata
V
Columbia River Basin
Andrena winnemuccana
V (DD)
OR
Ashmeadiella sculleni
V
NV, OR
Bombus affinis
rusty patch bumble bee
I
ON, QC CT, DE, GA, IA, IL, IN, KY, MA, MD, ME, MI, MN, NC, ND, NH, NJ, NY, OH, PA, SC, SD, TN, VA, VT, WI, WV
Bombus franklini
Franklin’s bumble bee CI (PE) CA, OR
Bombus occidentalis
western bumble bee
I
AB, BC, SK, YT AK, AZ, CA, CO, ID, MT, ND, NE, NM, OR, SD, UT, WA, WY
Bombus terricola
yellowbanded bumble bee
I
AB, SK, MB, NL, NS, ON, QC CT, IL, KY, MA, MD, ME, MI, MN, MT, NC, ND, NH, NY, OH, PA, RI, SD, TN, VA, VT, WI, WV
Calliopsis barri
V
ID, OR
Epeoloides pilosula
CI
MB, ON, SK CT, GA, MA, MD, MI, MT, NC, ND, NJ, OH, PA, NY, VA, WI, WV
Eucera douglasiana
V (DD)
WA
Eucera frater lata
V (DD)
Columbia River Basin
Halictus harmonius
CI
CA
Halictus pinguismentus
DD
BN
Hesperapis kayella
V (DD)
ID, NV
Hoplitis orthognathus
V
ID, OR, NV
Hoplitis producta subgracilis
V
Columbia River Basin
Hylaeus akoko
CI
HI
Hylaeus anomalus anomalous yellow-faced bee
CI (PE)
HI
Hylaeus anthracinus
CI
HI
Hylaeus assimulans
CI
HI
Hylaeus dimidiatus
CI
HI
Hylaeus facilis easy yellow-faced bee
CI
HI
Hylaeus finitimus
CI (PE)
HI
Hylaeus flavifrons
CI
HI
Hylaeus gliddenae
CI (PE)
HI
Hylaeus hilaris
CI
HI
Hylaeus hula
I
HI
Hylaeus kona
CI
HI
Hylaeus kuakea
CI
HI
Hylaeus longiceps
CI
HI
Hylaeus lunicraterius
V
ID
Hylaeus mana
CI
HI
Hylaeus mauiensis
CI (PE)
HI
Hylaeus melanothrix
CI
HI
Hylaeus nalo
CI (PE)
HI
Hylaeus niloticus
CI(PE)
HI
Hylaeus ombrias
CI
HI
Hylaeus paradoxicus
CI
HI
Hylaeus perspicuus
CI (PE)
HI
Hylaeus psammobius
CI
HI
Hylaeus satelles
CI
HI
Hylaeus simplex simple yellow-faced bee
CI
HI
Hylaeus solaris
CI
HI
Macropis steironema opaca
CI (PE)
WA
Osmia ashmeadii
CI
OR
Osmia cascadica
V
OR, WA
Perdita accepta
DD
OR
Perdita barri
DD
ID
Perdita crassihirta
DD
WA
Perdita salicis euxantha
V
ID, OR
Perdita salicis sublaeta
V
OR
Perdita similis pascoensis
V
WA
Perdita wyomingensis sculleni
V
Columbia River Basin
Perdita wyomingensis wyomingensis
DD
WY
Protandrena subdilatipes
V
WY
Protodufourea wasbaueri
DD
AZ, CA
Sphecodogastra antiochensis
CI
CA

Contributors

The Red List of Pollinator Insects of North America was a team effort. The lion’s share of the funding for the project was provided by the CS Fund. This project could not have been undertaken without them. Other funding was provided by members of the Xerces Society and from the Butterfly Conservation Initiative, which provided a small grant to develop profiles for the U.S. federally listed butterflies.

The Red List of Pollinator Insects of North America could not have been completed without the assistance of John Ascher from the American Museum of Natural History. John provided valuable information, advice, and direction for developing the section on native bees. We would also like to thank Karl Magnacca from the U.S. Geological Survey-Biological Resources Discipline for his help with bees in Hawaii, Robbin Thorp of University of California at Davis for his assistance with bumble bees, and Laurence Packer of York University for his assistance with several of the bee profiles. We want to thank Jaret Daniels of the McGuire Center for Lepidoptera Research for his profile on the Miami Blue. Thanks also to Xerces Society staff members Jeff Adams, Logan Lauvrey, and Ann Wawrukiewicz for help with editing and design. Abigail Hyduke from the Northwest Service Academy and Xerces volunteers Clara Elias, Amy Lambert, and Marie Elwood also provided valuable early research.

Although we did receive assistance from many people, we take full responsibility for any errors in this document.

For a full list of contributors or sources of taxonomic information, please see below.
The following scientists have all written Species Profiles and made other significant contributions to the Red List:

John S. Ascher, Ph.D., Postdoctoral Researcher, Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024. Telephone: (212) 496-3447; email: ascher@amnh.org.

Jaret Daniels, Ph.D., Assistant Director for Research, McGuire Center for Lepidoptera Research, Florida Museum of Natural History, Gainsville, FL 32611. Telephone: (352) 392-5894; email: drjcdaniels@aol.com.

Karl Magnacca, Ph.D., U.S. Geological Survey-Biological Resources Discipline, PIERC Kilauea Field Station, P.O. Box 52, Hawaii National Park, HI 96718. Email: kmagnacca@usgs.gov.

Laurence Packer, Ph.D., Professor, Department of Biology, York University, Toronto, ON M3J 1P3. Telephone: (416) 736-2100 x22663; email: bugsrus@yorku.ca.

Robbin W. Thorp, Ph.D., Emeritus Professor of Entomology, Department of Entomology, University of California, Davis, CA 95616. Telephone: (530) 752-0482; email: rwthorp@ucdavis.edu.

We also received advice and information from many other scientists, including:

  • Peter Kevan, University of Guelph;
  • Ron McGinley, Illinois Natural History Survey;
  • Paul Opler, Colorado State University;
  • John Pascarella, Valdosta State University; and
  • Cory Sheffield, Agriculture and Agri-Food Canada, Atlantic Food and Horticulture Research Centre.

TAXONOMIC SOURCES

In preparing the Species Profiles, the following were the principal sources for species names and authors:

Integrated Taxonomic Information System. http://www.itis.usda.gov/

International Lepidoptera Survey:

Jepson Flora Project (California). http://ucjeps.berkeley.edu/interchange.html

Michener, C. D. 2000. The Bees of the World. Baltimore, MD: Johns Hopkins University Press.

NABA. 2001. Checklist and English Names of North American Butterflies. 2nd edition. Morristown, NJ: North American Butterfly Association.

USDA-NRCS PLANTS database, Version 3.5. http://plants.usda.gov/

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