Danish species per municipalities.

       
Green Snaketail (Ophiogomphus cecilia)
Denmark
Status: Bern Convention. EU Habitat Directive II, IV. Strictly a species from the wetlands of central Jylland. Stable with a tendency to expand to new waterways in known range. Protection status perhaps needs a revision? Records from the perimeter of the range are fewer and some accidental by nature.

Not seen:
Endelave, Mandø
Samsø:
1 accidental record 2021 (https://www.naturbasen.dk/observation?id=3899662)
Midtjylland
Aarhus
Favrskov
Herning
Holstebro
Horsens
Ikast-Brande
Lemvig
Mariagerfjord
Randers
Ringkøbing-Skjern
Samsø
Silkeborg
Skanderborg
Skive
Syddjurs
Viborg
Østdanmark
Billund
Syddanmark
Esbjerg
Varde
Vejen
Vejle