Small Red-eyed Damselfly
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Erythromma viridulum
Common & widespread in Britain.
Like the Red-eyed Damselfly, both sexes lack pale spots behind the eyes and have pale brown pterostigmata.
The Male has a bronze-black top and blue sides.
The sides of the Female's thorax are yellow, green or blue.
The rear edge of the pronotum is rounded.
Viewed from the side, the second and eighth segment of the abdomen of the Male are mostly blue, which distinguishes it from the Red-eyed Damselfly where these are mostly black.
Flies from Late June-mid August.