Danish species per municipalities.

       
Common Goldenring (Cordulegaster boltonii)
Denmark
Status: Mainly central Jylland. In Denmark stable and possibly expanding to new nearby waterways as water quality improves. Earlier records from Sjælland and Lolland accidental.

Aarhus:
1 undocumented record Trige 2010 (https://www.naturbasen.dk/observation?id=563752)
Billund:
Few records Store Klingdal ø/Tofterup 2025 (https://www.naturbasen.dk/observation?id=5170313)
Esbjerg:
Barbaras Hule shared with Varde. 1 historic record Grimstrup 1908 (https://www.naturbasen.dk/observation?id=2157093), 1 historic record Kærgård Skov 1901 (https://www.naturbasen.dk/observation?id=2157069)
Frederikshavn:
1 historical record Sæby 1903 (https://www.naturbasen.dk/observation?id=2157096)
Herning:
Many records throughout. Ongoing.
Lemvig:
1 record Nissum Fjord 2017 (https://www.naturbasen.dk/observation?id=2323746), 1 record Klosterhede Plantage 2025 (https://arter.dk/fund/31577668)
Rebild:
Continuing records Stubberupvad, Lindenborg Å, Rold Skov 1944-ongoing (https://www.naturbasen.dk/observation?id=3885768)
Silkeborg:
Continuing records Jenskær, Gjessø s/Silkeborg 1906-ongoing (https://www.naturbasen.dk/observation?id=2157032)
Tønder:
1 undocumented record Sæd 2020 (https://www.naturbasen.dk/observation?id=3555801)
Varde:
Many records Barbaras Hule, Søndermarken 2018-ongoing, several records Nørholm Gods 1901-1931, few other localities throughout the municipality
Vejen:
1 record Baldersbæk 1970 (https://www.naturbasen.dk/observation?id=1839630)
Vejle:
Several records Vesterlund 2014-ongoing (https://www.naturbasen.dk/observation?id=1271848)
Midtjylland
Aarhus
Favrskov
Herning
Ikast-Brande
Lemvig
Rebild
Silkeborg
Skanderborg
Østdanmark
Billund
Syddanmark
Esbjerg
Tønder
Varde
Vejen
Vejle
Nordjylland
Frederikshavn