100 1037 Urothemis edwardsii Blue Basker Male Tzaneen Nov 2016r 4 100 669 Urothemis edwardsii Blue Basker MerenskyDam Nov 2015 r 3 100 1038 Urothemis edwardsii Blue Basker Female Ndumu Mch 2017r 9

Blue  Basker.     Blousonvangertjie.

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Images Male Female
100 1037 Urothemis edwardsii Blue Basker Male Tzaneen Nov 2016r 4 100 2072 Urothemis edwardsii Blue Basker Close up Male Hertzogberg MP Nov 2017r 2 100 2063 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 3
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Short description:

Blue Basker, Urothemis edwardsii, Genus Urothemis, Family Libellulidae, is medium sized, stout, dark blue and black with blackish hindwing patches and distinctive dark blue markings on the abdomen.

Key identification features:

Male: 100 2072 Urothemis edwardsii Blue Basker Close up Male Hertzogberg MP Nov 2017r 2

  • Face shiny black above and on top. Side of postclypeus and frons with light grey patch. Labium cream, often broadly blackish centrally 100 2074 Urothemis edwardsii Blue Basker Close up Male Hertzogberg MP Nov 2017r 3 100 2075 Urothemis edwardsii Blue Basker Close up Male Hertzogberg MP Nov 2017r 4
  • Eyes are black above and grey below.
  • Thorax deep deepblue with diffuse black markings especially along the top,with to black stripes on the side,often thorax blue pruinose with maturity. 100 2075 Urothemis edwardsii Blue Basker Close up Male Hertzogberg MP Nov 2017r 4
  • Hindwing with large, blackish, basal patch, with fine, amber halo.Forewing with minute traces of basal amber. Veins dark brown with cream coloured Ax veins and outer costal veins. Pterostigmas are light yellowish with a thin, black margin along the front edge. 100 2072 Urothemis edwardsii Blue Basker Close up Male Hertzogberg MP Nov 2017r 2
  • Abdomen is deep blue with distinct dark ladder-like blue/black arrowhead like pattern from the base to tip. Pruinose with maturity. Superior appendages brownish in colour. 100 2077 Urothemis edwardsii Blue Basker Close up Male Hertzogberg MP Nov 2017r 8  100 2076 Urothemis edwardsii Blue Basker Close up Male Hertzogberg MP Nov 2017r 7

Female: 100 2063 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 3

  • Similar in build, light brown with dark brown markings instead of blue.  100 2063 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 3 100 2064 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 4
  • Abdomen yelow/orange with simmilar markings as male 100 2069 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 23 100 2070 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 25
  • Hindwing patch less intense and more irregular in shape with large amber halo.100 2071 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 27
  • Wingtips have some amber.100 2071 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 27
Compared with other species:
  • Similar to the Red Basker, U. assignata, 100 2481 Urothemis assignata Red Basker Female Close up Ndumo KZN RSA Mch 2019r 1 but different in colour when compared to U. edwardsii100 2063 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 3
  • Female U. assignata 100 2483 Urothemis assignata Red Basker Female Close up Ndumo KZN RSA Mch 2019r 5  has reddish abdomen and less distinct abdominal markings than the female U. edwardsii 100 2069 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 23
  • Wing patches of U. assignata 100 2491 Urothemis assignata Red Basker Female Close up Ndumo KZN RSA Mch 2019r 26 larger and darker red than U. edwardsii 100 2071 Urothemis edwardsii Blue Basker Female Close up Ndumo KZN RSA Mch 2018r 27
Distribution and habitat:
  • Fairly common in the eastern coastal regions and the warm northern parts of South Africa.
  • Prefers standing waters, rivers and flowing channels in marshes, but possibly also lakes, in open landscapes, open areas in forest or shaded by gallery forest. Usually with emergent vegetation and often coarse detritus and a soft muddy bottom.
  • From 0 to 1600 m above sea level.
Behaviour:
  • Strong flight but soon returns to perch.
  • Typically rest in ‘pennant’ position, i.e. at the tip of a conspicuous perch, with legs thrust forward and wings raised with the abdomen angled up or down.
Further reading:
http://vmus.adu.org.za/vm_map_afr.php?&database=odonata&grid=2&outline=1&key=0&map=4&spp=%20665740%20%20%20
Books::
The Dragonflies and Damselflies of Eastern Africa     p. 216   
A Guide to Dragonflies and Damselflies of South Africa     p. 210
Dragonflies and Damselflies of South Africa    p.200
Dragonfly Biotic Index     p.197
Websites of interest:
Odonata Atlas of Africa VMU Number 665740   
The IUSC Red list of Threatened Species (Least Concern)
Warwick Tarboton
A Visual Guide to the Damselflies and Dragonflies of South Africa
African Dragonflies & Damselflies Online

Other Information:
Size Comparison Diagram Dragonflies, Damselflies
Morphology of a
Dragonfly and Damselfly
Map of South Africa
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