Blue Emperor    Anax imperator     Bloukeiser

Kimberly

Male Somerset West Western Cape 17 12 2015

102 523  Moreleta kloof

 Family Aeshnidae    (Leach, 1815)
Short description:

Blue Emperor, Anax imperator is large to very large sized, has a bright blue abdomen with brown markings on the upper side and a green thorax.

More Images:

108 522  Somerset West Western Cape 17 12 2015Image Gallery

100 2647 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 1Male

124 505 Anax Imperator Blue Emperor Female Port Elizabeth ECP RSA Apr 2016f 1Female

 

 

 

 

 

 

 

Click on images to enlarge or view more

Key identification features:

Male:

  • Face light to greenish blue. Nose with transverse dark edge above, black basal spot. Top of head greenish blue. 100 2651 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 23  100 2650 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 15
  • Eyes bright blue above, greenish blue below.100 2651 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 23 100 2650 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 15
  • Thorax green with two turquoise green patches between wings. 100 2648 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 13   100 2650 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 15  100 2649 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 11
  • Wings clear, becoming smoky with age, veins brown. Pterostigmas long (4.8–5.0 mm), reddish brown.
  • Abdomen bright blue with variable wide black line running along top. 100 2652 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 28  100 2653 Anax Imperator Blue Emperor Nylsvlei LP RSA Apr 2016r 33

Female: 124 505 Anax Imperator Blue Emperor Female Port Elizabeth ECP RSA Apr 2016f 1

  • Face yellow and green face, with black dot on dorsal surface of frons.
  • Eyes are olive green.
  • Thorax light to mid green
  • Wings are very smoky in old individuals. Pterostigmas are long (5 mm) and reddish brown.
  • Abdomen s 1 is yellowish green. S 2 is mostly pale, light blue. S 3 pale blue below. Rest of abdomen chocolate brown.
Compared with other species:
Distribution and habitat:

Distribution map May 2020Widespread and common throughout South Africa.
Mostly standing and probably often temporary waters, but also rivers and possibly large lakes, in open landscapes
Often with emergent and aquatic vegetation.
From 0 to 2800 m above sea level, but mostly below 1900.

Behaviour:
  • Blue Emperor, Anax imperator hawks rapidly up and down above the water surface.
Further reading and information:

Websites
Odonata Atlas of Africa VMU Number 664140
The IUCN Red List of Threatened Species    Least Concern
African Dragonflies & Damselflies Online
A Visual Guide to the Damselflies and Dragonflies of South Africa

 
X

Right Click

Copyrighted material - contact us if you want to buy a photo