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Agrion de Mercure (Coenagrion mercuriale)

• English name: Mercury Bluet
• German name: Helm-Azurjungfer
• French name: Agrion de Mercure
• Dutch name: Mercuurwaterjuffer
• Swedish name: Hjälmflickslända
• Norwegian name: N/A
• Finnish name: N/A
• Danish name: N/A
• Italian name: Azzurrina di Mercurio
• Czech name: šidélko přilbovité
• Slovenian name: Brzični škratec
• Bulgarian name: N/A

Agrion de Mercure (Coenagrion mercuriale)

Distribution map Coenagrion mercuriale

Map data based on J.-P. Boudot & V. J. Kalkman (eds.),
Atlas of the European Dragonflies and Damselflies


General • a small species which is reasonably common in Iberia, France, Germany and Italy
Classification • suborder: Zygoptera (damselflies); family: Coenagrionidae
Scientific name Coenagrion mercuriale (Charpentier, 1840)
Distribution • click or tap the Map button above
Habitat • well-vegetated streams and ditches
Dimensions • typical body length: 27-31 mm; hindwing: 12-21 mm
Both sexesWings➤ the pterostigma is dark grey with a black centre
MaleAbdomen• the black mark on S2 resembles Mercury's helmet
  ➤ for a comparision of the male's appendages with those of C. caerulescens and C. scitulum, click or tap here
FemaleThorax➤ the hind margin of the pronotum has a small lobe in the middle; see also the LineDrawing below
 Abdomen• the top of the abdomen is mostly black with blue-ringed segment borders between S8, S9 and S10
Photographs • all of our photos below were made in Tuscany and the South of Italy and show the subspecies C. m. castellani

Line DrawingLineDrawing: the female's pronotum in dorsal and lateral view.

Coenagrion mercuriale (left), C. caerulescens (centre) and C. scitulum (right); appendages, male
Note: In C. mercuriale the male's upper appendages are comparatively broad and straight.

Twelve Coenagrion species; pronotum, female
Note: In C. mercuriale the hind margin of the pronotum has a small lobe in the middle.

Mercury Bluet (Coenagrion mercuriale)
Female pronotum in dorsal and lateral view
Drawing by Ruth Ilka Nüß
© 2017 Lehmann & Nüß and DragonflyPix.com

Click on a thumbnail to display the photograph (at 1200 x 800 pixels) in a new window.

Coenagrion mercuriale, thumbnail 1 / 20
Agrion de Mercure (Coenagrion mercuriale) ♀

1 / 20; PhotoID: Da310 16/04/2014 11:30 Italy F8 1/45 180mm ISO200 Canon7D -Crop -Flash MF
Coenagrion mercuriale, thumbnail 2 / 20
Agrion de Mercure (Coenagrion mercuriale) ♀

2 / 20; PhotoID: Da311 23/04/2015 10:11 Italy F8 1/200 180mm ISO200 Canon7D2 -Crop -Flash MF
Coenagrion mercuriale, thumbnail 3 / 20
Agrion de Mercure (Coenagrion mercuriale) ♂

3 / 20; PhotoID: Da312 24/04/2008 13:27 Italy F8 1/125 180mm ISO100 Canon40D -Crop -Flash MF
Coenagrion mercuriale, thumbnail 4 / 20
Agrion de Mercure (Coenagrion mercuriale) ♀

4 / 20; PhotoID: Da313 17/05/2009 13:01 Italy F8 1/45 180mm ISO100 Canon50D -Crop -Flash MF
Coenagrion mercuriale, thumbnail 5 / 20
Agrion de Mercure (Coenagrion mercuriale) ♀

5 / 20; PhotoID: Da314 11/04/2017 10:27 Italy F10 1/160 180mm ISO200 Canon80D -Crop -Flash MF
Coenagrion mercuriale, thumbnail 6 / 20
Agrion de Mercure (Coenagrion mercuriale) ♂

6 / 20; PhotoID: Da315 27/04/2009 10:57 Italy F8 1/60 180mm ISO200 Canon50D -Crop -Flash MF
Coenagrion mercuriale, thumbnail 7 / 20
Agrion de Mercure (Coenagrion mercuriale) ⚤

7 / 20; PhotoID: Da316 11/05/2009 14:27 Italy F8 1/180 180mm ISO100 Canon50D -Crop -Flash MF
Coenagrion mercuriale, thumbnail 8 / 20
Agrion de Mercure (Coenagrion mercuriale) ⚤

8 / 20; PhotoID: Da317 17/05/2006 14:49 Italy F8 1/125 180mm ISO100 Canon30D -Crop -Flash MF
Coenagrion mercuriale, thumbnail 9 / 20
Agrion de Mercure (Coenagrion mercuriale) ♂

9 / 20; PhotoID: Da318 13/04/2017 16:13 Italy F8 1/125 180mm ISO400 Canon7D2 -Crop -Flash MF
Coenagrion mercuriale, thumbnail 10 / 20
Agrion de Mercure (Coenagrion mercuriale) ♂

10 / 20; PhotoID: Da319 21/04/2017 11:04 Italy F8 1/160 180mm ISO400 Canon7D2 -Crop -Flash MF
Coenagrion mercuriale, thumbnail 11 / 20
Agrion de Mercure (Coenagrion mercuriale) ♂

11 / 20; PhotoID: Da320 07/07/2016 14:49 Italy F8 1/100 180mm ISO400 Canon7D2 -Crop -Flash MF
Coenagrion mercuriale, thumbnail 12 / 20
Agrion de Mercure (Coenagrion mercuriale) ♂

12 / 20; PhotoID: Da323 11/04/2017 09:35 Italy F8 1/250 180mm ISO200 Canon80D -Crop -Flash MF
Coenagrion mercuriale, thumbnail 13 / 20
Agrion de Mercure (Coenagrion mercuriale) ⚤

13 / 20; PhotoID: Da322 21/05/2009 13:41 Italy F8 1/125 180mm ISO100 Canon50D -Crop -Flash MF
Coenagrion mercuriale, thumbnail 14 / 20
Agrion de Mercure (Coenagrion mercuriale) ♂

14 / 20; PhotoID: Da321 23/04/2015 10:26 Italy F8 1/100 180mm ISO200 Canon7D2 -Crop -Flash MF
Coenagrion mercuriale, thumbnail 15 / 20
Agrion de Mercure (Coenagrion mercuriale) ♀

15 / 20; PhotoID: Da324 19/04/2017 15:00 Italy F8 1/500 180mm ISO200 Canon7D2 -Crop -Flash MF
Coenagrion mercuriale, thumbnail 16 / 20
Agrion de Mercure (Coenagrion mercuriale) ♂

16 / 20; PhotoID: Da325 07/07/2016 15:01 Italy F8 1/100 180mm ISO400 Canon7D2 -Crop -Flash MF
Coenagrion mercuriale, thumbnail 17 / 20
Agrion de Mercure (Coenagrion mercuriale) ♀

17 / 20; PhotoID: Da326 06/04/2016 10:51 Italy F8 1/320 180mm ISO200 Canon7D2 -Crop -Flash MF
Coenagrion mercuriale, thumbnail 18 / 20
Agrion de Mercure (Coenagrion mercuriale) ♂

18 / 20; PhotoID: Da327 16/04/2008 11:59 Italy F6.7 1/125 180mm ISO100 Canon40D -Crop -Flash MF
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Agrion de Mercure (Coenagrion mercuriale) ♂

19 / 20; PhotoID: Da328 23/04/2009 11:41 Italy F8 1/90 180mm ISO200 Canon50D -Crop -Flash MF
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Agrion de Mercure (Coenagrion mercuriale) ♀

20 / 20; PhotoID: Da360 15/04/2009 11:44 Italy F5.6 1/250 180mm ISO100 Canon50D -Crop -Flash MF