Top 17 Most Common Insects in River Nile

Trithemis annulata is a robust medium-sized species with a wingspan of 6 cm. The mature male has a dark red head and a yellow labium with brown central spot. The eyes are red with white spots on the rear edge, and the frons is dark metallic purplish-red. The prothorax is violet with slightly darker longitudinal stripes. The membranous wings have distinctive red veins, the pterostigma is orange-brown and there is a large orange-brown splash at the base of the hind wings. The abdomen is fairly broad and is pinkish-violet, with purple markings on the top of each segment and blackish markings on the terminal three segments. Females are a similar size to males but the thorax is brownish and the abdomen is yellow with dark brown markings. The wings of females lack the red veins of males but have similar orange-brown patches.

Wet-season form. The upperside of males is white with the forewing having the costa from base to base of vein 11 dusky black and then jet black continuing into a widened and curving short streak along the discocellulars to the lower apex of the cell; apical area diagonally with the termen black, the former with six elongate outwardly pointed spots of the ground colour enclosed one in each of the interspaces 3, 4, 5, 6, 8, and 9. Hindwing: uniform, the black along the venation on the underside seen through by transparency; termen between veins 2 and 6 somewhat broadly black, with a series of four round spots of the ground colour in the interspaces; below vein 2 and above vein 6 the termen is very narrowly black. Underside: forewing white, markings similar, more clearly defined, the white spots within the black apical area larger. Hindwing: yellowish white, all the reins very broadly bordered with black; interspaces 1, 2, 6, and 7 with crossbars of black, beyond which there is a subterminal, somewhat broad, transverse band of black between veins 2 and 6. Cilia of both forewings and hindwings white alternated with black. The ground colour on both upper and undersides variable, often cream coloured above; beneath: in some specimens, the base of cell and the elongate spots in apical area of forewing, and the whole surface of the hindwing varies to rich chrome yellow. Female similar; the black markings on both upper and undersides broader, the white spots on black apical area of forewing often sub-obsolete above. Antennae in both sexes black, sparsely sprinkled with white dots; head, thorax and abdomen above and below white: thorax above often bluish grey. Dry-season form. The dry-season form is similar to the wet-season form but on the upperside the black markings are narrower, the white markings on the black apical area of forewing broader and longer, and on the hindwing the narrow inner margining to the black on the termen very narrow, somewhat obsolescent; therefore, the white subterminal spots have the appearance of opening inwards. Underside: ground colour almost pure white; on the hindwing slightly tinged with yellow. Antennae, head, thorax, and abdomen as in the wet-season form. Wingspan of 4.5 - 6 cm.

The wandering glider (Pantala flavescens) is a yellow dragonfly that migrates long distances. It's easily recognized by its elegant flight pattern, where it seems to glide across the sky effortlessly, even when it's windy outside. It often lands near still water, which includes ponds and puddles.

The wingspan is 24–32 mm for males and 24–34 mm for females. In these small butterflies the males have a mainly blue violet upper face of the wings with the brown edges, while the females have only a small amount of blue colour in the centre of the wings (sexual dimorphism). Both sexes have a thin, long tail in the hindwings and two black spots in the anal angle. The underface of the wings is ocher and adorned with white markings and with a larger white submarginal streak. The underface of each hindwing shows a pair of small black eye-spots beside each tail, with an orange marginal spots at the anal angle.

The face of the mature male is deep red, the vertex and top of the frons having a purple sheen. The eyes are deep red and the labium deep yellow with a dark brown stripe in the centre. The synthorax is red with black stripes; mature males often have a purple bloom on the upper thorax.The wings have bright red veins and orange makings at their bases. The pterostigmas are 2.5 - 2.5 mm long and dark brown. The slender abdomen is bright red; S6-S8 have black wedges on each side; S9 and S10 are black. Females have similar markings, but the abdomen and face are yellow to yellowish brown. The sides of the synthorax are pale yellow-brown, as are the lower sides of S1-S3.

Colotis danae, the crimson tip or scarlet tip, is a small butterfly of the family Pieridae, that is, the yellows and whites. It is found in Asia and Africa.