It is very similar to the Red-eyed Damselfly.

Red-eyed Damselfly is also found.

Tens of thousands of migrant turnip sawflies were recorded for a few days in late summer 2006, along with red-eyed damselflies.

Like the Red-eyed Damselfly, both sexes lack pale spots behind the eyes and have pale brown pterostigmata.

When perched on floating plants, the male holds its abdomen slightly upcurved (the Red-eyed Damselfly holds it straight).

Red-eyed Damselfly Erythromma najas is a member of the damselfly family Coenagrionidae.

The Council claims, too, the first sightings ever of small, red-eyed damselflies in Hillingdon at the ornamental pond of the Beck Theatre.

At first glance, this damselfly may resemble a Blue-tailed Damselfly or a Red-eyed Damselfly more than a typical Coenagrion species.

The Emperor Dragonfly, Migrant Hawker, Black-tailed Skimmer and Red-eyed Damselfly are amongst other breeding species.

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.

Odonata inhabiting the reserve include the Red-eyed Damselfly, Southern Damselfly, Scarce Blue-tailed Damselfly, Brown Hawker, Scarce Chaser and Keeled Skimmer.

An inventory of dragonfly larvae in 2000 unveiled several other species (mostly Red-eyed Damselfly but also Common Blue Damselfly, Azure Damselfly, Variable Damselfly, and Northern Damselfly (Coenagrion hastulatum).

An inventory of dragonflies in the north-eastern end of the lake documented a presence of Red-eyed Damselfly, Northern Damselfly, Azure Damselfly, Brown Hawker, Club-tailed Dragonfly, Downy Emerald, and Four-spotted Chaser.

The most common dragonfly is Emerald Damselfly, but Azure Damselfly, Variable Damselfly, Scarce Emerald Damselfly, Common Blue Damselfly, Downy Emerald, and Red-eyed Damselfly are also present.

An inventory of damselflies in 1997 resulted in a list of Emerald Damselfly, Red-eyed Damselfly, Variable Damselfly, Southern Hawker, Brilliant Emerald, Four-spotted Chaser, Eastern White-faced Darter, and Black Darter.

A second inventory in 2000 produced the following list interpreted as a normal amount of species: Common Hawker, Brown Hawker, Irish Damselfly, Variable Damselfly, Downy Emerald, Red-eyed Damselfly, Northern White-faced Darter, Brilliant Emerald, and Black Darter.