Denim Dropwing, Trithemis donaldsoni, Denimvalvlerkie

100 505  Male
  Male Tzaneen Nov 2016
T100-1095 Denim Dropwing Male
Short description:

Denim Dropwing, Trithemis donaldsoni, Denimvalvlerkie is small sized light blue with contrasting dark brown eyes.

Family Libellulidae Leach, 1815
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Guides:
Key identification features:

Males:

  • Face light brown with dark brown eyes with grey spots below.
  • Thorax (short and stubby) and abdomen are an even pale blue to pruinescent light grey.
  • Wings are clear with veins close to thorax showing light blue. Wings as long as abdomen. 10½-12½ Ax in forewing, only rarely 13½ 
  • Pterostigmas are reddish-brown between black veins, but very pale yellowish-brown on underside, especially in forewing.

Females:

  • Seldom seen. Lives far from water, only returning to the water to mate where it is very briefly seen
  • Eyes are brown
  • Thorax has distinct stripes
  • Abdomen stripes and markings similar to young male
 Habitat:
  • Rivers in open landscapes, shallow, rocky, strong flowing savanna rivers.  Usually with rocks.
  • Found from an altitude of 0 to 1700 m above sea level, but mostly between 200 and 1600.
Behaviour:
  • Territorial males perch mostly on stones or rocks either near the side or midstream.
  • Strong flyer, frequently darting off, returning to original perch.
Compared with other species:
Distribution:
Trithemis donaldsoni Denim Dropwing Distribution Map May 2020

 

 

 

 

 

 

 

 South Africa:

  • Found in the warm eastern and northern side of South Africa. 

Africa:

  •  Angola; Botswana; Democratic Republic of the Congo; Ethiopia; Kenya; Malawi; Mozambique; Namibia; Republic of South Africa; Rwanda; Tanzania; Uganda; Zambia; Zimbabwe;
Further reading:

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