Haarstad, J. 1997. The dragonflies of selected eastern Minnesota rivers. Report submitted to the Minnesota Department of Natural Resources. Unpaged.
During the summer of 1992 I visited 25 rivers and streams in eastern Minnesota collecting dragonfly exuviae and adults. Streams visited in the Northeast were the Gooseberry (1 site), Baptism (3 sites), Manitou (1 site), Temperance (4 sites), Cascade (2 sites), Stony (1 site), Kawishiwi (1 site), and St. Louis (3 sites). Streams visited in Eastcentral Minnesota were the St. Croix (12 sites), Kettle (5 sites), Snake (7 sites), Crooked Creek (1 site), Little Sand (1 site), Sand (2 sites), Rock Creek (1 site), Sunrise (1 site), Groundhouse (1 site), Ann (1 site), and Rum (2 sites). Streams visited in the Southeast were the Cannon (4 sites), Zumbro (5 sites), Whitewater (2 sites), Root (8 sites) and Mississippi (5 sites). A total of 33 species of riverine dragonflies were collected. Species of GOMPHIDAE included Hagenius brevistylus, Dromogomphus spinosus, Ophiogomphus earolus, Ophiogomphus colubrinus, Ophiogomphus howei, Ophiogomphus rupinsulensis, x Ophiogomphus sabrinus, Hylogomphus adelphus, Hylogomphus viridifrons, Gomphurus externus, Gomphurus fraternus, Gomphurus lineatifrons, Gomphurus vastus, Gomphurus ventricosus, Gomphus exilis, Gomphus graslinellus, Gomphus lividus, Gomphus quadricolor, Gomphus spicatus, Arigomphus cornutus, Stylurus amnicola, Stylurus notatus, and Stylurus spiniceps. Species of AESHNIDAE included Anax junius, Aeshna umbrosa, Basiaeshna janata, Boyeria grafiana, and Boyeria vinosa. Species of CORDULEGASTRIDAE included Cordulegaster maculata and Cordulegaster obliqua. Species of MACROMIIDAE included Didymops transversa and Macromia illinoiensis. Species of CORDULIIDAE included Cordulia shurtleffi, Epicordulia princeps, Epitheca canis, Epitheca spinigera, Neurocordulia yamaskenensis, Somatochlora minor, and Somatochlora elongata. LIBELLULIDAE (primarily Plathemis lydia, Libellula pulehella, Libellula luctuosa) were noted but generally not collected since most occur abundantly at ponds and marshes. Also noted was the presence of the damselflies Calopteryx aequabills, Calopteryx maculata, and Hetaerina americana.