Coenagrion lyelli

{{Short description|Species of damselfly}}

{{Speciesbox

| name = Swamp bluet

| image = Swamp Bluet, Coenagrion lyelli, male.jpg

| image_caption = Male

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn | author = Hawking, J. |title = Coenagrion lyelli | volume= 2009 | page = e.T163530A5612194 | date = 2009 | doi = 10.2305/IUCN.UK.2009-2.RLTS.T163530A5612194.en }}

| taxon = Coenagrion lyelli

| authority = (Tillyard, 1913){{Cite journal|last=Tillyard|first=R.J.|year=1913|title=On some new and rare Australian Agrionidae (Odonata)|url=https://www.biodiversitylibrary.org/page/2903681|journal=Proceedings of the Linnean Society of New South Wales|volume=37 |issue=1912|pages=404–479 [449]|doi=10.5962/bhl.part.22352|bibcode=1913PLSNS..37..404T |via=Biodiversity Heritage Library}}

| range_map = Coenagrion lyelli distribution map.svg

}}

Coenagrion lyelli is a species of damselfly in the family Coenagrionidae,{{Cite web|url=https://biodiversity.org.au/afd/taxa/Coenagrion_lyelli |title=Species Coenagrion lyelli (Tillyard, 1913)|date=2012|website=Australian Faunal Directory|publisher=Australian Biological Resources Study|access-date=8 April 2017}}

commonly known as a swamp bluet.{{Cite book|title=The Complete Field Guide to Dragonflies of Australia|last1=Theischinger|first1=Günther|last2=Hawking|first2=John|publisher=CSIRO Publishing|year=2006|isbn=978-0-64309-073-6|location=Collingwood, Victoria, Australia|pages=90}}

It is a medium-sized damselfly, the male is bright blue with black markings.{{Cite book|title=The Australian Dragonflies: A Guide to the Identification, Distributions and Habitats of Australian Odonata|last1=Watson|first1=J.A.L.|last2=Theischinger|first2=G.|last3=Abbey|first3=H.M.|publisher=CSIRO|year=1991|isbn=0643051368|location=Melbourne}}

It is found in south-eastern Australia, where it inhabits streams, pools and lakes.{{cite book|title=Identification Guide to the Australian Odonata|last2=Endersby|first2=Ian|date=2009|publisher=Department of Environment, Climate Change and Water NSW|isbn=978-1-74232-475-3|pages=209|last1=Theischinger|first1=Gunther|url=http://www.environment.nsw.gov.au/resources/publications/09730AustOdonata.pdf}}