Top 20 Most Common Insects in Taipei

Cyana hamata is a moth of the family Erebidae first described by Francis Walker in 1854. It is found in Japan, China, Taiwan, Korea and Thailand. The wingspan is 26–34 mm. Adults are on wing in February and September.

Tiracola aureata is a moth of the family Noctuidae first described by Jeremy Daniel Holloway in 1989. It is found from India and from China to Sundaland.

The larvae are dark brown, with a very pale yellow dorsal stripe.

The wingspan is about 5 cm for males and 6 cm for females. They have a semi-diurnal habit and rather elongated narrow body. The first two segments of the abdomen are black, and there are no dorsal bands in the male. The forewings are dark green. The basal black area of the hindwings is larger, reducing the width of the yellow band, which is very pale. The end of the abdomen is black in the male.

The larva of the tobacco cutworm is a major pest of agricultural crops such as tobacco, cotton, soybeans, and cabbage. These larvae feed on leaves voraciously. When the moth emerges into the adult stage, 70% of their total matings occur on their second night as an adult.

Pingasa ruginaria is a species of moth of the family Geometridae first described by Achille Guenée in 1857. It is found in northern India, south-east Asia, the Ryukyu Islands and Sundaland. The larvae have been recorded on Rhus, Liquidambar, Cinnamomum, Litsea, Crotalaria, Nephelium, Trema and Sterculiaceae species.

Males and females upperside white, in many specimens pale ochraceous yellow, veins black. Forewing with four very slender irregularly sinuous transverse black lines, the costal margin shaded with ochraceous at base and fuscous beyond; cell crossed by three or four additional short lines; a postdiscal very incomplete series of white-centred broad fuscous rings in the interspaces, tinged with ochraceous near the tornus and broadly interrupted in interspaces 3 and 4; beyond this two transverse black lines not reaching the dorsal margin, shaded with fuscous between; the apex broadly and the termen also shaded with fuscous. Hindwing with three transverse fine lines; a pair of postdiscal broad black lines shaded with light sepia brown between, forming a conspicuous band, the outer line broken and incomplete, followed by two irregular black lines, a subterminal more pronounced black line, and posteriorly a narrow black terminal margin; dorsal margin broadly fuscous at base; apical half and the tornal area and lobe rich ochraceous, with some sepia-brown and black markings. Underside similar, the markings of the upperside showing through by transparency; the ochraceous shading on dorsum and tornal area on hindwing of less extent, but the tornal lobe darker ochraceous with a central large round black spot. The markings both on upper and undersides vary a little in depth of colour and breadth. In many specimens there is a diffuse fuscous spot between the discal pair of transverse fine lines on forewing. Antennae, head, thorax and abdomen above black, thorax and abdomen with lateral greyish longitudinal stripes: beneath white. Body of the female paler than that of the male. Expanse 6 - 7 cm. The eggs were curious and beautiful, high domed-shaped or almost conical, with an aperture at the top fitted with a deeply dentate flat cap like a cogged wheel. The larva was unlike any other that, we have ever seen, slender, cylindrical and smooth; with two long curved divergent filaments or soft horns on the head, a single at outer sword-shaped one on the back at the 5th or 6th segment curved backwards and serrated on its inner edge, and another on the last segment curved forwards and serrated on its outer edge. The colour was a fine reddish brown with a broad green band on the side from the 5th to the last segment. The pupae were suspended by the tail, very much compressed, with a dorsal ridge from head to tail, high and obtusely pointed in the middle, the palpi-cases united and produced into a long somewhat recurved snout; colour brown with fine dark striae.

The wingspan of the adult is 3 cm. Its ground colour is fawn with a brown fasciations with complex patterns. A blurry dark blotch is found near the middle of each forewing. The caterpillar has a dull, pale yellow dorsum and fuscous ventral side with pink suffusion. A rusty colour appears towards the posterior end. Setae arise from black dots.

Eumelea ludovicata is a butterfly from the family of the spanners (Geometridae). The scientific name of the species was first validly published in 1858 by Guenée.