The one species of the genus found in North America - Cordulia shurtleffi - is widespread in our area (Map 1, below).
Fairly hairy, robust nymph are distinguished by their distinct brown lateral thoracic stripe and lack of mid-dorsal abdominal hooks. Walker and Corbet (1975) indicate that this fairly common species prefers sphagnum bogs and ponds, and larvae appears to be able to tolerate poorly oxygenated, stagnant waters. Emergence in Michigan is fairly early, from the beginning of May into June.
Other links with information on the biology or
ecology of larval Cordulia:
Brief habitat notes from Ottawa (Ontario, Canada) >> http://www.cyberus.ca/~jdsankey/odon2.html
Leach, W. E. 1815. Entomology, pp. 52-172. In Brewster's Edinburgh encyclopaedia. Vol. 9. Edinburgh.
Scudder, S. H. 1866. Notes on some Odonata from the White Mountains of New Hampshire. Proceedings of the Boston Society of Natural History 10:211-222.
Walker, E. M., and J. S. Corbet. 1975. The Odonata of Canada and Alaska, Vol. 3. University of Toronto Press: Toronto, Ontario. xvi + 308.