The following list of species of conservation importance for Monmouthshire has been drawn up using the British Dragonfly Society’s criteria. This list can be downloaded as a PDF document here.

Scarce Blue-tailed Damselfly Scarce and localised within Monmouthshire; specialised habitat. Near-threatened on a UK scale.
Variable Damselfly Scarce and localised within Monmouthshire; specialised habitat. Near-threatened on a UK scale.
White-legged Damselfly Uncommon in Monmouthshire; specialised habitat; indicative of high-quality sites with the potential for colonisation by other important breeding species; on western edge of UK range
Small Red Damselfly Probably extinct in Monmouthshire; if present, likely to be localised and in very small numbers; specialised habitat. Nationally Scarce on a UK scale.
Brown Hawker Inexplicably localised, with only one reliable Monmouthshire site
Common Hawker Scarce and localised within Monmouthshire; specialised habitat
Hairy Dragonfly Uncommon and localised within Monmouthshire; specialised habitat
Common Clubtail A keystone riverine species indicative of high water quality; the River Wye is one of the main UK strongholds for the species. Near-threatened on a UK scale.
Keeled Skimmer Scarce and localised within Monmouthshire; specialised habitat
Black Darter Scarce and localised within Monmouthshire; specialised habitat

 
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