Species of Coenagrion are generally medium-sized, brightly coloured damselflies.

[4] The genus Coenagrion includes the following species:[5][6][7] This genus's capacity for phenotypically plastic responses to the surface air temperature is important to species' ranges.

[13] These thermal responses will also decide a great deal of these species' responses to climate change.

[13] Nilsson-Örtman et al., 2012 find a high degree of thermal adaptation in high latitude populations of Coenagrion.

[13] They found similar plasticity even for various sympatric species at the same locations, and despite the highly variable weather at such latitudes.