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Aeshna palmata

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description Aeshna palmata Overview

Aeshna palmata, commonly referred to as the paddle-tailed darner, is a large dragonfly species in the family Aeshnidae. Described by Hermann August Hagen in 1856, it is primarily found in western North America, inhabiting marshy ponds, lakes, and slow streams. The species is distinguished by the male's uniquely shaped, paddle-like terminal abdominal appendages, which are used during mating. It is a common sight for naturalists observing late summer and early autumn insect activity.

help Aeshna palmata FAQ

How do you identify a male Aeshna palmata in the field?

The male paddle-tailed darner is most reliably identified by its expanded, paddle-shaped terminal appendages (cerci) at the tip of the abdomen, which give the species its common name. Males also display blue abdominal spots and characteristic thoracic stripes visible during close-range observation.

Where does the paddle-tailed darner live?

Aeshna palmata is found in western North America, ranging from the Pacific Northwest through the Rocky Mountains. It frequents marshy ponds, lake margins, and slow streams, often in forested or montane settings.

When is the flight season for Aeshna palmata?

Paddle-tailed darners are typically active from mid-summer through early fall, with peak flight generally from July through September. They are most readily observed patrolling over water during warm afternoon and evening hours.

How does Aeshna palmata differ from other darner dragonflies?

The species was described by Hermann Hagen in 1856 and is most reliably distinguished from other Aeshna species by the male's uniquely flattened, paddle-shaped cerci. Females can be harder to identify and may require close examination of thoracic stripe patterns and abdominal coloration.

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