Southern Riverking, Zygonoides fuelleborni, Krasse Bottelstert

100 3164 Zygonoides feulleborni Southern Riverking Male Leselo Lodge LP RSA Oct 2020r 5 Male
Soutrhern Riverking Female
100 1095 Zygonoides feulleborni Southern Riverking Ring Mabusa Nature Reserve MP RSA Dec 2017r 4Ring
Family Libellulidae Leach, 1815
Short description:

Southern Riverking, Zygonoides fuelleborni, Krasse Bottelstert is fairly large to large sized, mostly blackish with a few dull yellow spots.

Formally known as

Fuelleborn's Bottle-tail, Robust Bottletail, Robust Riverking

More images: 

River Reed Rapid Leselo Lodge LP RSA Oct 2020r 2Habitat

 

 

 

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Short description:

Fairly large to large sized, mostly blackish with a few dull yellow spots.

Key identification features:

Male:

  • Face yellow, black and grey. Labrum pale yellow with fine blackish margin and two central greyish dots. Anteclypeus and postclypeus light grey. 100 3178 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 25  Frons grey in front and top corners, with two blackish, slightly metallic,  100 3176 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 17  C-shaped markings touching in mid line from above.  100 3177 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 18 Top of head dark brown with grey pimple-like peaks.
  • Eyes bluish rather than green in life.100 3178 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 25   100 3176 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 17   100 3177 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 18
  • Thorax very large,dark brown with slight metallic green sheen and some patchy indistinct dull yellow stripes.   100 3173 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 10   100 3174 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 13   100 3175 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 15
  • Wings slightly smoky, front and underside of costal veins pale yellowish.  100 3183 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 37  Hind wing base dark brown. Pterostigmas black and long, 4.1–4.5 mm).   100 3182 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 35
  • Abdomen is noticeably swollen at base, narrowing down greatly on segments 3 and 4, (ratio widest: narrowest, 2.5:13:1) overall shiny black with dull yellow side spots and fine yellow line running along top of its length.  100 3180 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 28  Pale central band on s 7 widest laterally. S 3    100 3181 Zygonoides feulleborni Southern Riverking Male Close up Leselo Lodge LP RSA Oct 2020r 32  dark with pale spots, with white pruinescent ring with maturity, widest at sides and conspicuous in the field.

Female:

  • Female stouter, abdomen less constricted
  • Pterostigmas are long, 5 mm
  • Yellowish spots on abdomen more extensive to form rings.
Habitat:   River Reed Rapid Leselo Lodge LP RSA Oct 2020r 2
  • Mostly rivers, but also streams and large lakes, in open landscapes or shaded by gallery forest. Especially faster sections (rapids, falls), often with rocks.
    From 0 to 1500 m above sea level, but mostly below 1100, although possibly up to 2100.
Behaviour:
  • It occurs along broad, shallow, rocky, swift and hot savanna rivers with bushy or open banks.
  • It patrols swift rivers, regularly settling on bushes, sticks or on rocks in the water.Often hunts near rapids from close by perches
  • Hunting swarms wheel around high up between trees at dusk.
Compared with other species:
  • Its black and yellow colouring readily distinguishes it from Blue cascader (Zygonyx natalensis) 100 861 Zygonyx natalensis Blue Cascader Nwanedi LP RSA Dec 2015 r 3
  • Very similar to Z. torridus but settles far more frequently. It also has a horizontal, rather than vertical position at rest.
  • O. fuelleborni eyes are bluish (rather than green in life) Ringed Cascader (Z. torridus)   100 2719 Zygonyx torridus Ringed Cascader Male Nwanedi LP RSA Dec 2018r 2eyes are blackish
  • It is stouter than Z. torridus with shorter wings. In side view, the swollen, then contracted, abdomen (ratio widest: narrowest, 2.5:13:1) contrasts with Z. torridus (4:1.5)
  • Z. fuelleborni also has white, pruinescent ring in first third of abdomen.
  • Female of O. fuelleborni has longer (5 mm) pterostigmas than Z. torridus (4 mm),and frons above does not have central black mark.
  • Often found in same habitat as Z. natalensis and Z  torridus
 Distribution 

Zygonoides fuelleborni Southern Riverking Distribution Map June 2020Distribution Map
South Africa

Political Map South africa Political Map
South Africa

Topographical Map South Africa Topographical Map
South Africa

Zygonoides fuelleborni Southern Riverking Distribution Africa Map Aug 20212021Distribution Africa Map
Africa

Political Map AfricaPolitical Map
Africa

Topographical Map AfricaTopographical Map
Africa

South Africa

  • Northern KZN, MP, LP with recent record from north eastern GP.

Africa:

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

Websites:

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