Ringed Cascader (Zygonyx torridus), Male 107 542 Ringed Cascader Zygonyx torridus MP RSA Mch 2018r 1 107 538 Zygonix torrdus Ringed Cascader Reinion July 2018 3

Ringed Cascader   Kringklatertjie

Zygonyx torridus (Kirby, 1889)
More images: 
Images Male Male Female
107 541 Ringed cascader 1 100 737 Zygonyx torridus Ringed Cascader Male Farmstay LP RSA Dec 2017r 2 Zygonyx torridus Ringed Cascader Male Close up Nwanedi LP RSA Dec 2018 107 539 Zygonix torrdus Ringed Cascader Reinion July 2018 1
Click on images to enlarge or view more
Short description:

Ringed Cascader, Zygonyx torridus, Genus Zygonyx, Family Libellulidae, large sized, black with yellow ringed abdomen.

Key identification features:

Male:

  • Face yellow brown to dark brown in front, blackish metallic above. Labrum and anteclypeus dark brown. Postclypeus dark brown, dull yellow at sides. Frons yellow brown to dark brown along Covered with dark hair. Zygonyx torridus Ringed Cascader Male Close up Nwanedi LP RSA Dec 2018 margin and at sides, sightly dimpled black metallic purple in front and above. Top of head shiny dark brown, slightly metallic Zygonyx torridus Ringed Cascader Male Farmstay LP RSA Dec 2017
  • Eyes blackish brown Zygonyx torridus Ringed Cascader Male Close up Nwanedi LP RSA Dec 2018
  • Thorax slightly metallic black, with some indistinct (with age) broken yellow stripes Hind legs (largely) black. Zygonyx torridus Ringed Cascader Male Farmstay LP RSA Dec 2017 Neck and dorsal thorax (lateral thorax with less) covered with white hair. white hairZygonyx torridus Ringed Cascader Male Farmstay LP RSA Dec 2017
  • Wings clear and pointed, becoming slightly smoky with age. Pterostigmas, long and black, 100 1349 Zygonyx torridus Ringed Cascader Male Farmstay LP RSA Dec 2017r 17 can be variable in length, sometimes longer in forewing, 4.0–4.8 mm, compared to 4.2–4.5 mm in hindwing. 9½-11½ Ax in Forewing Zygonyx torridus Ringed Cascader Male Close up Nwanedi LP RSA Dec 2018 
  • Abdomen black with yellow side patches and fine yellow lines on top of each segment. Zygonyx torridus, Ringed Cascader, Male Close up Nwanedi LP RSA Dec 2018 Segments 4-8 with large lateral pale spots Zygonyx torridus Ringed Cascader Male Close up Nwanedi LP RSA Dec 2018. Yellow patches almost connected on s6 - 7, faint on s9, in the field giving the appearance that the abdomen is ringed in black and yellow Zygonyx torridus Ringed Cascader Male Farmstay LP RSA Dec 2017 . Segment 10 and appendages black

Female:

  • Similar to male,Zygonix torrdus Ringed Cascader Reinion July 2018 with black and yellow stripes on thorax distinct and top of head dull brown.Zygonix torrdus Ringed Cascader Reinion July 2018  Acdomen S1 - 2 broad yellow bands
Compared with other species:
  • Metallic tip of frons and vertex distinguishes Z. natalensis (Blue Cascader) Zygonyx natalensis Blue Cascader Male Close up Mabusai LP RSA Dec 2018 and Z. torridus (Ringed Cascader) Zygonyx torridus Ringed Cascader Male Farmstay LP RSA Dec 2017 from Orthetrum (Skimmers).
  • Both Z. natalensis and Z. torridus  hunting  behaviour of flying rapidly over splash zones are similar, but is unlike any Orthetrum (Skimmer)
  • Z. natalensis Zygonyx natalensis Blue Cascader Male Close up Mabusai LP RSA Dec 2018 is similar to but smaller than Z. torridus100 737 Zygonyx torridus Ringed Cascader Male Farmstay LP RSA Dec 2017r 2 Z. torridus is blackish brown with distinct yellow marks on abdomen and lightly pruinescent
  • Female Z. natalensis yellow markings make up only a small fraction of the abdominal segments Zygonyx natalensis Blue Cascader Young Female Nwanedi LP RSA SEP 2016(whereas it is about 50% Z. torridus Zygonix torrdus Ringed Cascader Reinion July 2018), Z. natalensis vertex is highly metallic Zygonyx natalensis Blue Cascader Male Close up Mabusai LP RSA Dec 2018. All brown and only slightly metallic in Z. torridus Zygonyx torridus Ringed Cascader Male Close up Nwanedi LP RSA Dec 2018. The upper corners of Z. natalensis frons are metallic Zygonyx natalensis Blue Cascader Male Close up Mabusai LP RSA Dec 2018, but yellow in Z. torridus Zygonyx torridus Ringed Cascader Male Close up Nwanedi LP RSA Dec 2018).

Distribution and habitat:

  • Its habitat is streams and rivers and shallow rivers with bush-lined or open banks, open landscapes, but sometimes in open areas in forest or shaded by gallery forest. Often faster sections (rapids, falls) with rocks and a gravelly and/or sandy bottom.
  • From 0 to 2300 m above sea level, but mostly below 1500, although possibly even higher up.
Behaviour:
  • It hawks up and down over riffles and glides, hovering over open stretches of fast water, or flies rapidly and high over and between bushes and trees away from the water, both in the day and at dusk.
  • The female is rarely close to the water and usually found hawking among bushes and trees.
Further Reading:
http://vmus.adu.org.za/vm_map_afr.php?&database=odonata&grid=2&outline=1&key=0&map=3&spp=%20669390 Books:
A Guide to Dragonflies and Damselflies of South Africap. 200

Dragonflies and Damselflies of South Africa   p. 189
Dragonfly Biotic Index   p. 186
Websites:
IUCN redd List of Threatened Species.
Odonata Atlas of Africa VMU Number 669390
Warwick Tarboton.
A Visual Guide to the Damselflies and Dragonflies of South Africa.
African Dragonflies & Damselflies Online
Other Information:
Size Comparison Diagram: Dragonflies and Damselflies

Identification and Morphology of a Dragonflyor Damselfly
Map of South Africa

X

Right Click

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