Denim Dropwing. Trithemis donaldsoni Denimvalvlerkie
Family Libellulidae Leach, 1815
Denim Dropwing, Trithemis donaldsoni, Denimvalvlerkie is small sized light blue with contrasting dark brown eyes.
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- Guide to Dropwings - General (Trithemis)
- Guide to Dropwings - Blue
- Guide to Dropwings - Red/Orange/Brown
Key identification features:
- 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.
- 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
Compared with other species:
- Distinctive with pale denim blue and very dark eyes.
- Navy Dropwing, T. furva, and Highlands Dropwing, T. dorsalis, look somewhat similar.
- Silhouette Dropwing, T. hecate, has a slender abdomen.
- Halfshade Dropwing, T. aconite, has a narrow yellowish streak along the top of the abdomen.
Distribution and habitat:
Found in the warm eastern and northern side of South Africa.
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.
- Territorial males perch mostly on stones or rocks either near the side or midstream.
- Strong flyer, frequently darting off, returning to original perch.