Danish species per municipalities.

       
Small Bluetail (Ischnura pumilio)
Denmark
Status: First seen in Denmark in 1935, the species is well-established but being a pioneer species it fluctuates to some degree, disappearing and emerging with the changing numbers of suited breeding sites. Most records from Jylland, but always small numbers. On Sjælland, Karlstrup Grusgrav, Solrød, has been a longtime location for the species including 2025. Amager also continues to produce individuals, though apparently declining after 2022-23.

Jylland:
Tønder - one undocumented record, 2011, n/Løgumkloster (link)
Aabenraa - one record, Kalvø 1935 (link)
Haderslev - one record, Gram Storskov 1938 (link)

Sjælland:
Allerød - Birkedal v/Lillerød 2016-2021 (link)
Furesø - few records St. Hareskov 2020-21 (link)
Glostrup - 1 undocumented record Ejby Mose 2008 (link)
Gribskov - 2 records Bølleljungen, Tisvilde Hegn 2020+2024 (link), 1 record Tisvilde Hegn 2024 (link)
Guldborgsund - 1 record Gedser 2025 (link)
Helsingør - 1 record Fandens Hul 2023 (link), 1 record west of Snekkersten 2025 (link)
Hillerød - few records Smørkilde Bakke s/Hillerød 2018-2021 (link)
København - few records Amager Fælled, Nordhavnen and Christianshavn 2020-2024.
Lyngby-Taarbæk - few records Dyrehaven 2022-23 (link)
Odsherred - 2 records Ordrup Næs 2018 (link), 1 record Hørve 2020 (link)
Slagelse - one record Halskov 2014 (link)
Syddanmark
Aabenraa
Esbjerg
Haderslev
Kolding
Langeland
Middelfart
Nyborg
Sønderborg
Tønder
Varde
Vejen
Vejle
Nordjylland
Aalborg
Frederikshavn
Hjørring
Jammerbugt
Morsø
Thisted
Midtjylland
Aarhus
Hedensted
Herning
Holstebro
Horsens
Ikast-Brande
Mariagerfjord
Norddjurs
Randers
Rebild
Ringkøbing-Skjern
Silkeborg
Skive
Syddjurs
Vesthimmerland
Viborg
Østdanmark
Allerød
Billund
Furesø
Glostrup
Gribskov
Guldborgsund
Helsingør
Hillerød
København
Lyngby-Taarbæk
Odsherred
Slagelse
Solrød
Tårnby