Has eastern and western forms. See print references.
Northern North America: boreal forests south to midwest
Shaded streams in forests, also shaded ponds, swamps etc.
Predatory on flying insects. Feeds often at dusk, prefers shade.
Flies late in year. Female darners typically oviposit into aquatic plants, using their blade-like ovipositors. Female Shadow Darners frequently oviposit into wet, decaying wood. (Blue Darners of British Columbia--see Internet references.)
Dunkle, pp. 45-46, plate 4 (1)
Odonata United States
--note that dot map is incomplete