Evening Hawker, Anaciaeschna triangulifera, Nagventer.
Evening Hawker, Anaciaeschna triangulifera, Nagventer. is very large, slender, dark brown with bright blue eyes, head and abdominal saddle, and greenish and blue abdominal spots.
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Key identification features:
- Face is light blue going to pale grey at sides and towards labrum. Frons above is light blue with a deep black, mushroom-like marking and about ½ as wide as head. Vertex is blue. Two pale dots in front of the eyes.
- Eyes are bright sky blue above, light blue below.
- Synthorax is dull brown with some greenish yellow spots (but no shoulder stripes) and two, bright yellow diagonal stripes on side. Auricles are present
- Wings are lightly smoky to very smoky in old individuals. Veins black. Pterostigmas is fairly short (3.2 mm), reddish brown. Membranule large, broadly bordering anal triangle for more, than ½ its length and is whitish towards the rest of the wing, becoming dark grey closest to abdomen. Hindwing tornus is angled. Hindwing cubital field is always of 2 rows at base.
- Abdomen very slender and mostly deep chocolate brown and shiny. S1 has a blue bar above, and yellow one below. From above, S2 is brown in anterior half but bright blue behind. S2 below is yellow and brown. S3 has a bright patch in anterior half at side and below. The rest of abdomen has small, light blue spots, becoming larger on S8-10.
- Much stouter than male.
- Face is yellowish but with a similar pattern on frons.
- Eyes are sienna above with bright yellow margin below.
- Abdomen is reddish brown with pale blue markings
- Standing and often temporary waters in open landscapes, open areas in forest or shaded by gallery forest.
- From 0 to 2100 m above sea level, but mostly between 800 and 1700.
- Dusk flier over reeds and in clearings in warm areas.
Compared with other species:
- Bright blue head and eyes,
- Bright yellow thorax side stripes and long, thin abdomen is diagnostic.
- No shoulder stripes.
- Mushroom-shaped, black marking on frons is also distinctive.
- Similar to Forest Hawker, Z. usambarica, but are medium-sized (hindwing 41-45 mm) and the male’s face is bluish white, the eyes are bright blue (but brown when young), and the small abdomen spots are also bluish.
- Rater thinly spread in southern Africa
- Democratic Republic of the Congo; Ethiopia; Kenya; Malawi; Mozambique; Republic of South Africa; Rwanda; Tanzania; Uganda; Zambia; Zimbabwe;
- A Visual Guide to the Damselflies and Dragonflies of South Africa
- Encyclopedia of Life
- The IUCN Red List of Threatened Species Least Concern
- Odonata Atlas of Africa VMU Number 664070.
- African Dragonflies and Damselflies Online