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Family Corduliidae - Emeralds

Clamp-tipped? - Somatochlora tenebrosa - female Juvenile blue dasher? - Epitheca Epitheca canis Forcipate Emerald - Somatochlora forcipata - male Beaverpond Baskettail - Epitheca canis - male Epitheca canis female - Epitheca canis - female dragonflies on marsh boardwalk - Somatochlora franklini - male - female Robust Baskettail - Epitheca spinosa - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Odonata (Dragonflies and Damselflies)
Suborder Anisoptera (Dragonflies)
Family Corduliidae (Emeralds)
Explanation of Names
Named for the bright emerald metalic green eyes.
50 spp. in 7 genera in our area(1), ca. 400 spp. in almost 50 genera of 6 subfamilies worldwide(2)(3)
medium to large sized dragonflies, 35 to 68 mm long.
Usually have bright emerald metallic green eyes and sometimes thorax (although some species are duller).
Eyes touch for a fair section.

Best diagnosed to family by the wing patterns: dissimilar wing triangles and anal loop (in the hind wing) that is foot shaped but without a distinct toe. (4)

Individual species can be identified by the males tail appendages , or the females genitalia plates , , . A good field guide will have drawings of these features to assist with identification of each species.
Prefer to hang rather than perch. Often perch on vegetation or stems on an 45 deg angle.
Print References
Works Cited
1.Dragonfly Society of the Americas. 2012. North American Odonata
2.Australian Faunal Directory
3.Dragonflies of the World
Jill Silsby. 2001. Smithsonian Institution Press.
4.Field Guide to The Dragonflies and Damselflies of Algonquin Provincial Park and the Surrounding Area
Colin D. Jones, Andrea Kingsley, Peter Burke, and Matt Holder. 2008. Friends of Algonquin.