Calopteryx aequabilis 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Insecta Odonata Calopterygidae

Scientific Name: Calopteryx aequabilis Say, 1840
Common Name(s):
English River Jewelwing
French Caloptéryx à Taches Apicales
Agrion aequabile ssp. californicum Kennedy, 1917
Agrion coloradicum Cockerell, 1913
Calopteryx aequabilis ssp. yakima Hagen, 1889
Calopteryx hudsonica Hagen, 1877
Calopteryx virginica Selys, 1853
Taxonomic Source(s): Schorr, M. and Paulson, D. 2014. World Odonata List. Tacoma, Washington, USA Available at: (Accessed: 17 February 2014).
Taxonomic Notes: Several described subspecies, none of them very well defined.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2017
Date Assessed: 2014-11-28
Assessor(s): Paulson, D. R.
Reviewer(s): Cannings, R. & Tognelli, M.F.
Calopteryx aequabilis is common across North America and occurs in many protected areas; there is no indication of any population decline or significant threats. Hence, it is listed as Least Concern.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This northern North American species occurs from British Columbia and Northwest Territories to Newfoundland, south to California, Colorado, Illinois and New Jersey. It occurs in 10 provinces and one territory in Canada and 30 states in the United States of America.
Countries occurrence:
Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland I, Northwest Territories, Nova Scotia, Ontario, Prince Edward I., Québec, Saskatchewan); United States (California, Colorado, Connecticut, Idaho, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New York, North Dakota, Ohio, Oregon, Pennsylvania, Rhode Island, South Dakota, Utah, Vermont, Virginia, Washington, Wisconsin, Wyoming)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Calopteryx aequabilis is an abundant and widespread species.
Current Population Trend:Stable
Additional data:
Continuing decline of mature individuals:No
Extreme fluctuations:NoPopulation severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Calopteryx aequabilis is found at clear streams of all sizes and rivers with moderate current. Can be common in places on rather tiny wooded streams, as long as there is some sun penetration. It is typically at larger streams than C. maculata, although the two occur together commonly. Also seen at rocky shores of large lakes in some areas. Larvae live among rootlets and aquatic vegetation.
Systems:Terrestrial; Freshwater

Threats [top]

Major Threat(s): There are no significant threats presently affecting this species.

Conservation Actions [top]

Conservation Actions: The species is widespread and common and present in some federal, state, provincial, local, and/or private reserves; no further conservation measures seem to be required at this time. Considered critically imperiled in British Columbia (BC Conservation Data Centre), but Rank under review 2015; there are now four widespread localities known in the province.

Classifications [top]

1. Forest -> 1.1. Forest - Boreal
1. Forest -> 1.4. Forest - Temperate
5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education

Bibliography [top]

Acorn, J. 2004. Damselflies of Alberta. University of Alberta Press, Edmonton, Alberta, Canada.

Cannings, R.A. 2002. Introducing the dragonflies of British Columbia and the Yukon. Royal British Columbia Museum, Victoria, BC, Canada.

Hutchings, G., & D. Halstead. 2011. Dragonflies & damselflies in the hand: an identification guide to boreal forest odonates in Saskatchewan and adjacent regions. Nature Saskatchewan, Regina, Saskatchewan, Canada.

IUCN. 2017. The IUCN Red List of Threatened Species. Version 2017-3. Available at: (Accessed: 5 December 2017).

Jones, C.D., A. Kingsley, P. Burke & M. Holder. 2008. Field guide to the dragonflies and damselflies of Algonquin Provincial Park and the surrounding area. The Friends of Algonquin Park, Whitney, Ontario, Canada.

Kennedy, C.H. 1915. Notes on the Life History and Ecology of the Dragonflies (Odonata) of Central California and Nevada. Proc. U.S. Nat. Mus. 52(2192): 483-635

Kerst, C., & Gordon, S. 2011. Dragonflies and Damselflies of Oregon. Oregon State University Press, Corvallis.

Manolis, T. 2003. Dragonflies and damselflies of California. University of California Press.

Nikula, B., Loose, J.L. and Burne, M.R. 2003. A Field Guide to the Dragonflies and Damselflies of Massachusetts. Massachusetts Division of Fisheries & Wildlife.

Paulson, D. 2009. Dragonflies and Damselflies of the West. Princeton University Press, Princeton.

Paulson, D. 2011. Dragonflies and Damselflies of the East. Princeton University Press, Princeton.

Paulson, D.R. and Dunkle, S.W. 2009. A checklist of North American Odonata including English name, etymology, type locality, and distribution. Originally published as Occasional Paper No. 56, Slater Museum of Natural History, University of Puget Sound, June 1999; completely revised 2012. Available at:

Pilon, J.-G. and Lagacé, D. 1998. Les Odonates du Québec. Entomofaune du Québec (EQ) Inc., Chicoutimi.

Walker, E.M. 1953. The Odonata of Canada and Alaska. Vol. I, Part I: General. Part II: The Zygoptera—damselflies. University of Toronto Press.

Westfall, M.J., Jr., and May, M.L. 2006. Damselflies of North America. Scientific Publishers, Gainesville, Florida.

Citation: Paulson, D. R. 2017. Calopteryx aequabilis. The IUCN Red List of Threatened Species 2017: e.T165005A65826235. . Downloaded on 23 September 2018.
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