Introduction: Tropical Threadtails (Elattoneura cellularis) inhabit rivers and are a rare species in Namibia. The Latin cellula means 'cell' and aris 'pertaining to' a reference to the features of the hindwings.
Distribution: Impalila Island at the Chobe River rapids.
Colouration: Similar to the Common Threadtail. Black with a bluish-grey coating on the head and back of the thorax. Bright blue eyes. Females are pale brown with a distinct cream-coloured stripe on the side of the thorax.
Breeding: Not known.
Flight season: Insufficient data.
Conservation: Rare but not threatened.