|Scientific Name:||Anax junius (Drury, 1773)|
Anax spiniferus Rambur, 1842
Libellula junia Drury, 1773
|Taxonomic Source(s):||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: http://www.odonatacentral.org/docs/NA_Odonata_Checklist_2012.pdf.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor(s):||Paulson, D. R.|
|Reviewer(s):||Clausnitzer, V. & Kalkman, V. (Odonata Red List Authority)|
A. junius is common all across North America and there no indication of any population decline, nor are any threats currently identified.
|Range Description:||This species occurs in nine provinces in Canada, fifty one states in the United States of America, eighteen states in Mexico, Kamchatka in the Russian Federation and many Caribbean Islands within the Greater and Lesser Antilles.|
Native:Bahamas; Belize; Bermuda; Canada (Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward I., Québec, Saskatchewan); Cayman Islands; Cuba; Dominican Republic; Guadeloupe; Guatemala; Jamaica; Martinique; Mexico (Baja California, Baja California Sur, Chihuahua, Coahuila, Durango, Hidalgo, Jalisco, Michoacán, Morelos, Nayarit, Oaxaca, Quintana Roo, Sinaloa, Sonora, Tabasco, Tamaulipas, Veracruz, Yucatán); Puerto Rico; Russian Federation (Kamchatka); United States (Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Hawaiian Is., Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming); Virgin Islands, British
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||A. junius is an abundant and widespread species.|
|Current Population Trend:||Stable|
|Habitat and Ecology:||A. junius is found at lakes and all but the smallest ponds, also slow streams. Because of migratory nature, it is liable to be seen anywhere at or away from water. It has a relatively rare breeding strategy: large proportion of populations in most areas are migratory. Mature adults move north in spring throughout North America, they appear before any can be found emerging. These individuals breed, their larvae develop during summer, and their offspring emerge in late summer, then they fly south in immature colours. At times migrants are seen in large numbers, especially on Atlantic coast but also in the Great Lakes. Occasionally found far out at sea off southern California in fall, commonly seen from oil platforms in Gulf of Mexico. These individuals presumably breed somewhere in Mexico and the Caribbean, probably also in far southern United States, their larvae developing during winter and their offspring moving north in spring. This scenario is speculative but with strong circumstantial evidence. Fewer individuals in same regions are more like other dragonflies, emerging in spring from larvae that overwintered locally.|
|Major Threat(s):||There are no threats presently affecting this species.|
|Conservation Actions:||Present in many federal, state, local, and private reserves in Canada, Mexico, and the United States of America. The migratory nature of A. junius mandates cross-border cooperation, although so far no reason for concern.|
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Dunkle, S.W. 2000. Dragonflies Through Binoculars. Oxford University Press, Oxford.
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Paulson, D.R. 1999. Dragonflies (Odonata: Anisoptera) of south Florida. Slater Museum of Natural History; Occasional Papers 57: 1-139.
Walker, E.M. 1958. The Odonata of Canada and Alaska. Vol. II, Part III: The Anisoptera—Four Families. University of Toronto Press.
Whitehouse, F.C. 1943. A guide to the study of dragonflies of Jamaica. Bulletin of the Institute of Jamaica. Science series. 3: 1-69.
Wikelski, M., Moskowitz, D., Adelman, J.S., Cochran, J., Wilcove, D.S. and May, M.L. 2006. Simple rules guide dragonfly migration. Biology Letters 2(3): 325-9.
|Citation:||Paulson, D. R. 2009. Anax junius. The IUCN Red List of Threatened Species 2009: e.T165081A5962282.Downloaded on 21 October 2017.|