Danish species per municipalities.

       
Brilliant Emerald (Somatochlora metallica)
Denmark
Status: Stable and probably expanding in Denmark. Also expanding in Nordic region and decreasing in C Europe, likely due to the climate changes.

Most common south and central Jylland plus NE Sjælland, very scarce Fyn, Lolland, Falster, other southern islands and Bornholm. Probably overlooked due to habit of favoring the waters of creeks and canals.

Not seen:
Anholt, Mandø, Saltholm
Ballerup:
1 record Egebjerg 2020 (https://www.naturbasen.dk/observation?id=3460228)
Lolland:
2 undocumented records Maribo 2021 (https://www.naturbasen.dk/observation?id=3890320)
Brøndby:
1 record Brøndbyskoven 2017 (https://www.naturbasen.dk/observation?id=2247704)
Glostrup:
2 records Ejby Mose 2008+24 (https://jesperbayjacobsen.com/page_start.php?file=florafaunaview&search=singlephoto&id=2735)
Herlev:
1 undocumented record Smørmosen 2017 (https://www.naturbasen.dk/observation?id=2290470)
Mariagerfjord:
1 undocumented record Hobro 2015 (https://www.naturbasen.dk/observation?id=1656779)
Odense:
1 record s/Hjallelse 2022 (https://www.inaturalist.org/observations/122930045)
Solrød:
1 undocumented record Karlstrup Grusgrav 2015 (https://www.naturbasen.dk/observation?id=1630603)
Struer:
1 undocumented record Lyngs 2008 (https://www.naturbasen.dk/observation?id=237002)
Syddanmark
Aabenraa
Assens
Esbjerg
Faaborg-Midtfyn
Fanø
Fredericia
Haderslev
Kolding
Langeland
Middelfart
Nordfyns
Nyborg
Odense
Svendborg
Sønderborg
Tønder
Varde
Vejen
Vejle
Nordjylland
Aalborg
Brønderslev
Frederikshavn
Hjørring
Jammerbugt
Læsø
Morsø
Thisted
Midtjylland
Aarhus
Favrskov
Hedensted
Herning
Holstebro
Horsens
Ikast-Brande
Lemvig
Mariagerfjord
Norddjurs
Randers
Rebild
Ringkøbing-Skjern
Samsø
Silkeborg
Skanderborg
Skive
Struer
Syddjurs
Vesthimmerland
Viborg
Østdanmark
Allerød
Ballerup
Billund
Bornholm
Brøndby
Egedal
Faxe
Fredensborg
Frederikssund
Furesø
Gladsaxe
Glostrup
Gribskov
Guldborgsund
Halsnæs
Helsingør
Herlev
Hillerød
Holbæk
Hvidovre
Høje-Taastrup
Hørsholm
Kalundborg
København
Køge
Lejre
Lolland
Lyngby-Taarbæk
Næstved
Odsherred
Ringsted
Roskilde
Rudersdal
Slagelse
Sorø
Stevns
Tårnby
Vordingborg