A very local insect in the uk, though can be abundant in some localities where it is found. It can be told from other Emeralds by its Downy thorax, and the Copper suffusion on its abdoman.
Downy Emeralds like areas of ancient Woodland adjacent to standing water, hunting along rides. They emerge earlier than many other species of british Dragonflies, in April. The males are seen patrolling territory along the edge of water.