Pond Damselflies
Family Coenagrionidae
Genus Enallagma
Hagen's Bluet (Enallagma hageni)

"Blue-type" Bluet – the male's abdomens are predominantly blue when viewed from above, however, some males may be "intermediate-type" (see photo below). This damselfly has small eyespots. Similar species – Familiar Bluet (Enallagma civile), Marsh Bluet (Enallagma ebrium) and possibly the Tule Bluet (Enallagma carunculatum). Flight season: early June to mid-August. Population: uncommon, to date this is the sole local habitat where Hagen's Bluets have been encountered. Length: about 30 mm. Familiar, Marsh and sometimes Tule Bluets are very similar in appearance and cannot be reliably separated by sight. The only way to be certain as to species is by study of the male's cerci and female's mesostigmal plates. Tweed, Ontario, the north shore Stoco Lake near the pavilion: marshy shoreline, relatively shallow water with mud bottom supporting sedges and rushes, pondweeds, Fragrant Water Lily, Blue Flag, Sagittaria spp and Pickerelweed. Male Hagen's Bluet (Enallagma hageni) and its claspers July 15, 2010 ...................................................................... Male Hagen's Bluet (Enallagma hageni) – the profile of the claspers is discernible without the benefit of a magnifying glass or loupe. Note that this individual has "intermediate-type" patterning, with progressively more black than blue from S4 to S6 (August 19, 2014).