• Habitats occupied in Scotland and in southeast England are only broadly similar: sheltered, standing or slow-flowing waters usually, but not always, edged with good tree cover.
• Larvae need a place to hide underwater and ideally need the dark – i.e. shade provided by trees, overhanging banks, etc.
• Water bodies ideally but not exclusively need to have a soft peaty or muddy substrate, often overlaid with leaf litter.

• Over-management or lack of appropriate management.
• Deforestation
• Reduction in water levels.
• Pollution.
• Introduction of fish.

Listed as Vulnerable in the British Odonata Red List 2008.

The Brilliant Emerald is considered to be a nationally rare species.

Downy Emerald

• Hairier.
• More bronze in appearance.

Northern Emerald

• More bronze in appearance.

Brilliant Emerald Management Profile

General management principles include maintaining water levels and targeting survey work to map emergence sites. There are also best practice guidelines for managing inhabited sites including sensitive cutting of emergent vegetation, dredging and pruning.