Stor kejserguldsmed (Anax imperator)
• English name: Blue Emperor
• German name: Grosse Königslibelle
• French name: Anax empereur
• Dutch name: Grote keizerlibel
• Swedish name: Blå kejsartrollslända
• Norwegian name: N/A
• Finnish name: Keisarikorento
• Danish name: Stor kejserguldsmed
• Italian name: Imperatore comune
• Czech name: šídlo královské
• Slovenian name: Veliki spremljevalec
• Bulgarian name: Царски пъстролет
Stor kejserguldsmed
(Anax imperator)

Map data based on J.-P. Boudot & V. J. Kalkman (eds.),
Atlas of the European Dragonflies and Damselflies
| General | • a very large species, common and widespread throughout Europe but still rare in the very north | |
| Classification | • suborder: Anisoptera (dragonflies); family: Aeshnidae | |
| Conservation status | • IUCN Red List Europe: Least Concern | |
| Scientific name | • Anax imperator Leach, 1815 | |
| Name genus | • Anax: from Grk. ἄναξ = master, ruler, king | |
| Name species | • imperator: from Lat. imperator = commander, emperor | |
| Distribution | • click or tap the Map button above | |
| Habitat | • well-vegetated ponds and lakes | |
| Dimensions | • typical body length: 66-84 mm; hindwing: 45-52 mm | |
| Notes | • the female oviposits on her own, unguarded by the male, on floating vegetation | |
| • aeshnids are 'fliers': they spend a lot of time on the wing and seldom hang up for a rest | ||
| Both sexes | Head | ➤ the black mark on top of the frons is pentagonal in shape |
| Thorax | • the thorax is typically apple green, with only the thinnest of dark lines on the side and without an antehumeral stripe | |
| Male | Head | • the eyes are blue-green |
| Abdomen | ➤ the abdomen is light blue, with a thick dark mid-dorsal line | |
| Female | Head | • the eyes are green-yellow |
| Abdomen | • the abdomen is light blue, pale green or beige, with a thick dark mid-dorsal line | |
| Wings | • the wings may have a suffused orange tint | |
| Photographs | • nearly all of our photos below were made in Tuscany and the south of Italy |
LineDrawing: the male's abdomen in dorsal and lateral view, the male's appendages in dorsal view, and the female's abdomen in dorsal view.


Blue Emperor (Anax imperator)
Male abdomen in dorsal view
Drawing by Ruth Ilka Nüß
© 2021 Lehmann & Nüß and DragonflyPix.com

Blue Emperor (Anax imperator)
Male abdomen in lateral view
Drawing by Ruth Ilka Nüß
© 2021 Lehmann & Nüß and DragonflyPix.com

Blue Emperor (Anax imperator)
Male appendages in dorsal view
Drawing by Ruth Ilka Nüß
© 2021 Lehmann & Nüß and DragonflyPix.com

Blue Emperor (Anax imperator)
Female abdomen in dorsal view
Drawing by Ruth Ilka Nüß
© 2021 Lehmann & Nüß and DragonflyPix.com