Cicindela patruela patruela Dejean, 1825
Northern Barrens Tiger Beetle
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Basis for Listing
The northern barrens tiger beetle was first observed in Minnesota in 1889 in Cass County. It has subsequently been located in Anoka, Chisago, Crow Wing, Morrison, Pine, Sherburne, Todd, Wadena, and Winona counties. Although widespread, this species occurs in a habitat that is easily destroyed by development. It is abundant in areas where it receives protection. The northern barrens tiger beetle was listed as a special concern species in Minnesota in 1996.
Adult northern barrens tiger beetles are 13-14 mm (0.51-0.55 in.) long, and are usually bright green with a transverse ivory band in the middle of each wing cover. Black individuals have occasionally been collected within the large population at Sand Dunes State Forest, suggesting possible gene-flow between the Minnesota and central Wisconsin (C. p. huberi) subspecies.
The northern barrens tiger beetle is found in openings and sandy roads through pineries, often with scattered ground cover of mosses and lichens. Jack pine (Pinus banksiana) barrens are ideal habitat for this species.
Biology / Life History
Adult northern barrens tiger beetles emerge in the fall (as early as mid-August), begin hunting until colder weather, and then burrow underground for the winter. They re-emerge in early spring (mid-May), begin mating and laying eggs, and then slowly die-off as the summer progresses.
Conservation / Management
The northern barrens tiger beetle occurs in a habitat that is threatened by development, and possibly off-road vehicle use and clearcutting of large areas (Steffens 2005). Further surveys are needed to determine if its distribution is as fragmented as it appears.
Conservation Efforts in Minnesota
Additional surveys are needed to determine the distribution and abundance of northern barrens tiger beetles in central Minnesota. Steffens (2005) has identified a number of sites with potential habitat for this species.
Dawson, R. W., and W. Horn. 1928. The tiger beetles of Minnesota. University of Minnesota Agricultural Experiment Station Technical Bulletin 56. 13 pp.
Johnson, W. N. 1989 (1990). A new subspecies of Cicindela patruela from west-central Wisconsin. Cicindela 21(2):27-32.
Pearson, D. L., C. B. Knisley, and C. J. Kazilek. 2006. A field guide to the tiger beetles of the United States and Canada: identification, natural history, and distribution of the Cicindelidae. Oxford University Press, New York. 227 pp. + plates.
Steffens, W. P. 2005. Rare tiger beetle surveys in central and northwest Minnesota, Fall 2004. Report submitted to the County Biological Survey, Minnesota Department of Natural Resources. 11 pp.
Willis, H. L. 2001. Zoogeography of Cicindela patruela in Wisconsin (Coleoptera: Cicindelidae). Cicindela 33(1-2):1-18.