Skimmers
Family Libellulidae
Genus Leucorrhinia
Dot-tailed Whiteface (Leucorrhinia intacta)



Similar species – other Leucorrhinia females.


Flight season: early May to mid-August.

Population: common, most frequently encountered at the marshy north shore of Stoco Lake but can be expected at most local wetlands.

Length: about 30 mm. Yellow dot on female's S7 is somewhat square and wider than mark on S6, also best to examine the subgenital plate.


Tweed, Ontario, the north shore Stoco Lake, from east of the boat pier to 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 Dot-tailed Whiteface (Leucorrhinia intacta)
June 06, 2009
Female Dot-tailed Whiteface (Leucorrhinia intacta)
June 06, 2009
Dot-tailed Whiteface (Leucorrhinia intacta), wheel – the same male and female as depicted above (June 06, 2009).

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Teneral male Dot-tailed Whiteface (Leucorrhinia intacta)
June 08, 2010

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Female Dot-tailed Whiteface (Leucorrhinia intacta) – with a considerable amount of dark wash near the bases of its wings (July 21, 2010).



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.
An aged female Dot-tailed Whiteface (Leucorrhinia intacta), male-like in appearance (July 11, 2014).