Key to the Odonata Families of Monteverde, Costa Rica

Distance between base of wing and nodus less than one third the wing length; inner end of stigma not touching a cross vein; wings held apart at rest; medium to large - MEGAPODAGRIONIDAE

Heteragrion-erythrogastrum-m-1494e6.jpg
MEGAPODAGRIONIDAE

Distance between base of wing and nodus about one third the wing length; inner end of stigma touching a cross vein; wings held together over abdomen at rest; mostly small - COENAGRIONIDAE

Argia-extranea-m-1038-1e6.jpg
COENAGRIONIDAE
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