Keeled Skimmer Orthetrum coerulescens

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36-46mm; Wingspan: Male 57-63mm; Hindwing 28-34mm; Larva: 17-23mm


Keeled Skimmer at Tranmire Bog - 03/07/2011
Dark brown thorax with buff antehumeral stripes, which fade with age. When mature the abdomen is blue, except S1. Blue grey eyes. Wings have a yellow tint when immature which clear as they mature. Pale yellow costa and orange pterostigma. Blue grey eyes.


Keeled Skimmer - Orthertrum coerulescens
Dark brown thorax with buff antehumeral stripes. The abdomen is a yellow/brown colour with a thin dark keel line down the centre. Pale yellow costa and orange pterostigma.


Males have small territories observing them from the ground or low perches. Copulation occurs on the ground and can last anything from 2-60 minutes. Flight is fast and erratic with brief spells of hovering. Wings are held well forward when at rest. Females spend a lot of time resting in vegetation not far from water.


Acidic wet heath and peaty moorland sites typically with sphagnum mosses, frequents pools, runnels and streams.

Flight Period

Confined to VC62 where it appears to be present in suitable sites surrounding Fylingdales Moor. Several records of dispersing individuals.

Distribution Map


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