DragonflyPix

Downy Emerald (Cordulia aenea)

• Scientific name: Cordulia aenea (Linnaeus, 1758)
• English name: Downy Emerald
• German name: Falkenlibelle
• French name: Cordulie bronzée
• Dutch name: Smaragdlibel
• Swedish name: Guldtrollslända
• Norwegian name: Smaragdøyenstikker
• Finnish name: Vaskikorento
• Danish name: Grøn smaragdlibel
• Italian name: Smeralda bronzea
• Czech name: lesklice měděná
• Slovenian name: Močvirski lebduh
• Bulgarian name: Мъхеста зеленка
• Typical length: 47-55 mm
• Hindwing: 29-35 mm

Downy Emerald (Cordulia aenea)

Distribution map

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

The Downy Emerald (Cordulia aenea) is the only species of its genus in Europe. It's a relatively common species in Central and Northern Europe species, but very rare in the British Isles, Northern Sweden and Norway, and the Mediterranean basin. Its downiness presumably helps explain its early flight (i.e. early in the year as well as early in the day). The territorial males inspect the water's edge looking for ovipositing females, alternating swift flight with brief hovering. Those females tend to betray their presence (at least to the human observer) by the rustling of their wings in the dense vegetation while they lay their eggs. Cordulia aenea's distinguishing features include the bronze (rather than green-metallic) colour of the abdomen, the dark yellow patches at the wing bases, the male's clubbed abdomen (broadest at S7-8), the large white patch on the underside of the female's S3, and the absence of the long vulvar scale typical of the female Brilliant (or Balkan) Emerald.

Line DrawingLineDrawing: the male's appendages, the male's abdomen and the female's abdomen in dorsal view.

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1 / 20; PhotoID: Dr844 13/05/2011 13:33 Greece F8 1/200 180mm ISO400 Canon7D -Crop -Flash MF
2 / 20; PhotoID: Dr845 27/06/2008 10:17 Finland F8 1/250 180mm ISO200 Canon40D -Crop -Flash MF
3 / 20; PhotoID: Dr846 17/06/2011 14:23 Austria F8 1/200 180mm ISO400 Canon7D -Crop -Flash MF
4 / 20; PhotoID: Dr862 25/04/2011 10:01 Netherlands F5.6 1/800 180mm ISO400 Canon7D -Crop -Flash MF
5 / 20; PhotoID: Dr863 14/05/2013 15:19 Netherlands F8 1/30 180mm ISO200 Canon7D -Crop -Flash MF
6 / 20; PhotoID: Dr864 19/06/2016 10:28 Sweden F8 1/500 180mm ISO400 Canon7D2 -Crop -Flash MF
7 / 20; PhotoID: Dr895 22/04/2011 11:25 Netherlands F8 1/40 180mm ISO200 Canon7D -Crop -Flash MF
8 / 20; PhotoID: Dr924 22/06/2016 11:44 Sweden F10 1/400 180mm ISO400 Canon7D2 -Crop -Flash MF
9 / 20; PhotoID: Dr925 13/05/2011 13:44 Greece F6.3 1/250 180mm ISO400 Canon7D -Crop -Flash MF
10 / 20; PhotoID: Dr926 05/07/2008 13:18 Finland F5.6 1/500 180mm ISO400 Canon40D -Crop -Flash MF
11 / 20; PhotoID: Dr927 13/05/2011 13:25 Greece F8 1/250 180mm ISO400 Canon7D -Crop -Flash MF
12 / 20; PhotoID: Dr928 23/06/2016 10:29 Sweden F8 1/400 180mm ISO400 Canon7D2 -Crop -Flash MF
13 / 20; PhotoID: Dr934 21/06/2016 17:01 Sweden F8 1/125 180mm ISO200 Canon7D2 -Crop -Flash MF
14 / 20; PhotoID: Dr1043 23/06/2016 12:16 Sweden F8 1/320 180mm ISO400 Canon7D2 -Crop -Flash MF
15 / 20; PhotoID: Dr1044 04/05/2009 14:07 Netherlands F5.6 1/180 180mm ISO200 Canon50D -Crop -Flash MF
16 / 20; PhotoID: Dr1047 13/05/2009 11:32 Germany F5.6 1/60 180mm ISO200 Canon50D -Crop -Flash MF
17 / 20; PhotoID: Dr1048 14/05/2013 14:28 Netherlands F8 1/350 180mm ISO400 Canon7D -Crop -Flash MF
18 / 20; PhotoID: Dr1049 15/05/2013 12:33 Netherlands F8 1/90 180mm ISO400 Canon7D -Crop -Flash MF
19 / 20; PhotoID: Dr1325 08/05/2010 14:08 Netherlands F8 1/45 180mm ISO200 Canon7D -Crop -Flash MF
20 / 20; PhotoID: Dr1490 13/05/2011 15:07 Greece F8 1/160 180mm ISO200 Canon7D -Crop -Flash MF