Flight season: early June to late September.
Population: less common than other Aeshna species.
Most encounters in this area have occurred in the vicinity of marshes.
Length: about 75 mm.
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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.
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Male Black-tipped Darner (Aeshna tuberculifera) –
the broad, relatively straight thoracic stripes of this individual are so pale as to be almost white.
More commonly the stripes are blue, sometimes green or yellow, but always considerably paler than seen in other darners
(July 24, 2014).
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West of Tweed, Ontario, a high and dry field bordering the trans-Canada Trail:
a dry field with sandy soil, drought tolerant grasses and wildflowers, Sweetfern, and Rubus spp.
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Male Black-tipped Darner (Aeshna tuberculifera)
August 18, 2014
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Male Black-tipped Darner (Aeshna tuberculifera) –
the cerci are straight and simple,
and as this darner's name implies, S10 is all black
(August 18, 2014).
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A female Black-tipped Darner (Aeshna tuberculifera) –
the photo is annotated with pointers on how to separate this dragonfly from female
Lance-tipped Darners
(August 18, 2014).
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The terminalia of the female Black-tipped Darner (Aeshna tuberculifera) depicted above –
Note the pointed tips on the leaf-like appendages and the long conspicuous styli.
(August 18, 2014).
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