Damselfly (Zygoptera) Naiads

Tweed, Ontario, the north shore Stoco Lake, east of the boat pier: marshy shoreline, relatively shallow water with mud bottom supporting sedges and rushes, pondweeds, Fragrant Water Lily, Blue Flag, Sagittaria spp and Pickerelweed. Typical Pond Damselfly (Coenagrionidae) naiad October 22, 2011 Tweed, Ontario, about ½ km west of town, a marsh bordering the trans-Canada Trail: typical local marsh with Cattails, sedges and other emergent vegetation, various small willows, alders, dogwoods and some Tamarack. Typical Spreadwing (Lestidae) naiad June 25, 2012 East of Tweed, Ontario, near the old railroad (trans-Canada Trail) bridge over the Moira River: rock-bottomed river, fast current, shrubs and trees along the shoreline. Typical Broad-winged Damselfly (Calopterygidae) naiad – note the very long basal segments of the antennae (August 19, 2013). In fact, according to Odonata Larvae of Michigan, Key to the Calopteryx Larvae of Michigan – "... tubercles behind eyes prominent and acute ..." – looking at the oblique view the spine behind the eye is clearly prominent and acute, and this is an Ebony Jewelwing (Calopteryx maculata) naiad (August 19, 2013).