Mercury bluet
Coenagrion mercuriale (Charpentier, 1840)
Status not recordeddragonflies
The mercury bluet (Coenagrion mercuriale) is a species in the family Coenagrionidae, order Odonata. Recorded adults reach 3.1 cm in length.
No freely licensed photo yet
Quick facts about the mercury bluet
- Weight
- Not recorded
- Length
- 2.7 cm – 3.1 cm
- Lifespan
- Not recorded
- Diet
- Invertivore
- Main food
- Not recorded
- Habitat
- freshwater, riverine
- Young per litter or clutch
- Not recorded
- Active
- By day (diurnal)
- Generations a year
- One every two years or more
- Conservation status
- Not recorded
- Countries on record
- Not recorded
How big is the mercury bluet?
Where does the mercury bluet live?
Not recorded
Is the mercury bluet endangered?
No conservation assessment is recorded for this species in our sources. That is not the same as being safe: it has not been matched to an assessment.
How is the mercury bluet classified?
- kingdomAnimalia
- phylumArthropoda
- classInsecta
- orderOdonata
- familyCoenagrionidae
- genusCoenagrion
- SpeciesCoenagrion mercuriale (Charpentier, 1840)
Synonyms Agrion fonscolombii, Agrion hermeticum, Agrion mercuriale, Enallagma mercuriale
Other names and names in other languages (24)
- Southern blue damselflyEnglish
- Southern CoenagrionEnglish
- Southern damselflyEnglish
- Southern DamsleflyEnglish
- Donzell mercurialCatalan
- šidélko přilbovitéCzech
- Coenagrion BenfroWelsh
- HelmazurjungferGerman
- Agrion de MercurioSpanish
- Agrion de MercureFrench
- Donceliña de MercurioGalician
- Zapadna vodendjevojčicaCroatian
- Azzurrina di MercurioItalian
- MercuurwaterjufferDutch
- Libelinha de MercúrioPortuguese
- Стрелка южнаяRussian
- šidielko veľkoškvrnnéSlovak
- Brzični škratecSlovenian
- Pilivesa jugoreAlbanian
- Стрілка МеркуріяUkrainian
- Mursen Las PenfroWelsh
- Mursennod Glas PenfroWelsh
- Helm-AzurjungferGerman
- Azulado de MercurioSpanish
Relatives of the mercury bluet
Other species in the same genus Coenagrion.

Azure damselfly
Coenagrion puella
Variable bluet
Coenagrion pulchellum
Spearhead bluet
Coenagrion hastulatum
Dainty bluet
Coenagrion scitulum
Dark bluet
Coenagrion armatum
Crescent bluet
Coenagrion lunulatum
CompareMercury bluet vs Azure damselflyMercury bluet vs Variable bluetMercury bluet vs Spearhead bluetMercury bluet vs Dainty bluet
Common questions
Answered only where our data holds the answer.
How big is the mercury bluet?
An adult mercury bluet measures 2.7 cm – 3.1 cm long, according to values recorded on Wikidata.
What kind of animal is the mercury bluet?
The mercury bluet (Coenagrion mercuriale) belongs to the family Coenagrionidae in the order Odonata.
Sources and how to cite this page
Data as of 2026-11-11. How this page is put together.
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Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1 - AmphiBIO, a global database for amphibian ecological traits · CC BY 4.0 · v1
Oliveira, B.F., São-Pedro, V.A., Santos-Barrera, G., Penone, C. & Costa, G.C. (2017) AmphiBIO, a global database for amphibian ecological traits. Scientific Data 4: 170123. https://doi.org/10.1038/sdata.2017.123. Data: https://doi.org/10.6084/m9.figshare.4644424.v5 - AVONET: morphological, ecological and geographical data for all birds · CC BY 4.0 · v7
Tobias, J.A. et al. (2022) AVONET: morphological, ecological and geographical data for all birds. Ecology Letters 25: 581–597. https://doi.org/10.1111/ele.13898. Data: https://doi.org/10.6084/m9.figshare.16586228.v7 - Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf - Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence). - EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals · CC0 1.0 · 1.0
Wilman, H., Belmaker, J., Simpson, J., de la Rosa, C., Rivadeneira, M.M. & Jetz, W. (2014) EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95: 2027. https://doi.org/10.1890/13-1917.1. Data: https://doi.org/10.6084/m9.figshare.3559887.v1 - LepTraits 1.0: a globally comprehensive dataset of butterfly traits · CC0 1.0 · 1.0
Shirey, V., Larsen, E., Doherty, A. et al. (2022) LepTraits 1.0: a globally comprehensive dataset of butterfly traits. Scientific Data 9: 382. https://doi.org/10.1038/s41597-022-01473-5. Data: https://doi.org/10.6084/m9.figshare.19874602.v1 - Northwestern European arthropod life histories and ecological traits (raw datasets) · CC BY 4.0 · 2024-12-17
Logghe, G., Batsleer, F., Maes, D. et al. (2025) An in-depth dataset of northwestern European arthropod life histories and ecological traits. Biodiversity Data Journal 13: e146785. https://doi.org/10.3897/BDJ.13.e146785. Data: https://doi.org/10.5281/zenodo.13379714 - ReptTraits: a comprehensive dataset of ecological traits in reptiles · CC BY 4.0 · v1-2
Oskyrko, O., Mi, C., Meiri, S. et al. (2024) ReptTraits: a comprehensive dataset of ecological traits in reptiles. Scientific Data 11: 243. https://doi.org/10.1038/s41597-024-03079-5. Data: https://doi.org/10.6084/m9.figshare.24572683.v4 - Sharkipedia: a curated open access database of shark and ray life history traits · CC BY 4.0 · 1.0-2022-06-17
Mull, C.G., Pacoureau, N., Pardo, S.A. et al. (2022) Sharkipedia: a curated open access database of shark and ray life history traits and abundance time-series. Scientific Data 9: 559. https://doi.org/10.1038/s41597-022-01655-1. Data: https://doi.org/10.5281/zenodo.6656525 - SquamBase 1.0 - a dataset of squamate species traits · CC0 1.0 · 1.0-dryad-v5
Meiri, S. (2024) SquamBase - a database of squamate (Reptilia: Squamata) traits. Global Ecology and Biogeography 33(4): e13812. https://doi.org/10.1111/geb.13812. Data: https://doi.org/10.5061/dryad.76hdr7t3b - TraitCH: a multi-taxa functional trait dataset for Switzerland and Europe · CC BY 4.0 · 2.0
Chauvier, Y., Adde, A., Bergamini, A. et al. (2025) TraitCH: a multi-taxa functional trait dataset for Switzerland and Europe. Zenodo. https://doi.org/10.5281/zenodo.15063844 - Wikidata · CC0 1.0 · 2026-11-11
Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service). - Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).
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Copy this code. The card shows the photo with its credit, key facts and a link back to this page.
CreatureData. (2026). Mercury bluet (Coenagrion mercuriale). Retrieved from https://creaturedata.com/animals/mercury-bluet
“Mercury bluet (Coenagrion mercuriale).” CreatureData, 2026, https://creaturedata.com/animals/mercury-bluet.
@misc{mercury_bluet_2026,
title = {Mercury bluet (Coenagrion mercuriale)},
author = {{CreatureData}},
year = {2026},
url = {https://creaturedata.com/animals/mercury-bluet},
note = {Data as of 2026-11-11}
}