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The Dragonflies (Insecta: Odonata) of the Columbia Basin, British Columbia: Field Surveys, Collections Development and Public Education Table of Contents Return to Systematic Review of the Fauna Family Corduliidae (Emeralds) In the Columbia Basin the Corduliidae is a family best seen around lakes, boggy streams and peatlands in the mountains or in the north. Seven of ten species are boreal in distribution. The adults of Cordulia and Somatochlora, the most often encountered genera, are medium-sized dragonflies with metallic blackish-green or brassy bodies and green eyes. Epitheca individuals are mainly brown. Corduliid larvae are usually squat and rather hairy; they live in the bottom detritus. Genus: Cordulia Leach Epitheca Burmeister Somatochlora Selys

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