Top 19 Most Common Insects in Andaman and Nicobar Islands

Upper side, ground colour rich ferruginous-red, the basal area slightly tinged with olivescent yellowish-ferruginous. Cilia alternately black and white. Forewing with three black slender bars crossing the cell, and three similar bars below the cell between the basal interspaces of the middle and lower medians; beyond the cell is a large outwardly-oblique pure bluish-white more or less triangulate spot followed by a transverse discal macular band, broadest in the dry-season brood, composed of a series of large broad pure bluish-white spots proceeding from the costa to the posterior margin, of which the upper five are subapical and disposed obliquely outward, the third and fourth being ovate, the upper two very slender and divided by the second subcostal branch, the fifth much the smallest; the next four are disposed somewhat obliquely inward and are much larger, the sixth (or upper) triangularly ovate, the seventh longest and bluntly ovate or somewhat quadrate, the eighth quadrate with its outer edge indented, and the lowest narrow; all these white spots are bordered with black, which colour broadly extends from the cell along the costa and thence decreases hindward; beyond is an outer marginal broad lunularly inner-edged, or occasionally dentate, black waved band, which is traversed by two contiguous slender grey sinuous marginal lines. Hindwing with three black slender bars crossing the cell, and a small spot between the basal interspaces of the veins above the cell; a transverse medial discal broad pure bluish-white macular black-bordered band terminating at the submedian, its inner edge somewhat regular and its outer edge scalloped ; followed by an outer discal row of black ill-shaped cordate spots, which are more or less obsolescent posteriorly, or occasionally entirely absent, a similar submarginal row of smaller dentate spots, and then a contiguous narrow waved black marginal band traversed by two slender grey sinuous lines. Underside. Basal area bluish or olive-grey, the outer discal area and the apical veins of forewing bright red; discocellular spot on forewing and transverse discal macular band, as above, bluish-white or greyish-white and black bordered; basal bars black, with the interspace between the middle cell bars and of those below the cell on the forewing bright red; marginal markings as above, except that the marginal sinuous fines are violet-grey, and the inner line broadly encompassing the submarginal black spots on the hindwing. Body above red; palpi above black, beneath greenish-white; body beneath and legs bluish-grey; antennae black, tip reddish beneath; eyes bronzy-brown.

Like many tropical butterflies, this species shows seasonal polyphenism, with the appearance differing between adults according to the season. Male upperside has the ground colour pale bluish white. The forewing has the terminal margin narrowly edged with black that broadens very slightly towards the apex of the wing; the cilia are brownish black. The hindwing is uniformly coloured, except for an anteciliary black line faintly edged on the inner side by a white line within which and touching it is a row of black spots, the anterior spots very faint, the spot in interspace 2 large and well-defined, two geminate (paired) spots in interspace 1 and a very small black lunular dot in interspace 1a; cilia brown, white at the base in the interspaces. In specimens obtained in the height of the dry season the black edging to the termen of the forewing is much reduced and the subterminal series of black spots in the hindwing is altogether missing. The underside is greyish brown. The forewing has seven transverse white bands as follows: two short bands one each side of the discocellulars, the inner one continued downwards to vein 1 and both represented at the costa by two detached spots; two parallel discal bands, the inner one broken at and the outer one terminating on vein 3; two parallel subterminal bands, the outer one slightly lunular; lastly, a more slender terminal band followed by an anteciliary slender black line; the dorsal margin narrowly white; cilia brownish black, their bases white in the interspaces. Hindwing: crossed by nine white bands or lines as follows: three between base of wing and apex of cell, those posteriorly in interspace 1 or on vein 1 abruptly turn upwards and terminate on the dorsum; the first band beyond the cell extends from vein 6 to vein 2, then curves upwards in interspace 1; the next extends straight from just below the costa to vein 4, thus overlapping the previous band for a short distance; the next or postdiscal band runs between the costa and vein 3, the subterminal two also between the costa and vein 3 but the inner one of the two bands is extended down to interspace 1 and there curves upwards towards the dorsum; both the subterminal bands are more or less lunular; in the interspace below vein 2 is a large subterminal black spot speckled with metallic blue scales and bordered inwardly by ochraceous orange; there are also in interspaces la and 1 two black dots inwardly edged by a short white streak set in an ochraceous background; lastly, there is a complete terminal white line followed by a black anteciliary line and a filamentous short black white-tipped tail at apex of vein 2; cilia as on the upperside. Antennae brownish black, the shafts as usual tinged with white; head, thorax and abdomen pale brown, bluish on thorax and base of abdomen; beneath: the palpi, thorax and abdomen white, the third joint of the palpi and the second joint anteriorly black. The female has the upperside ground colour paler than in the male, often quite white; terminal black edging to forewing very much broader, broadest at apex, its margin there diffuse. Hindwing: differs from that of the male as follows: costal margin broadly dusky black; a postdiscal transverse series of dusky-black connected lunules often more or less obsolescent; this is followed by a series of black spots each set in a background of the white ground colour; an anteciliary slender black line as in the male. The underside ground colour is paler than in the male, the markings however are identical. Antenna, head, thorax and abdomen as in the male. Closely resembles the males and females of the dry-season brood; the markings are similar but the ground colour is generally darker both on the upper and undersides, while the black edging to the forewing and the black postdiscal and terminal markings to the hindwing on the upperside are broader and more clearly defined. Antennae, head, thorax and abdomen as in the dry-season brood.

Distinctive in its solitary lifestyle, black potter wasp has some fascinating behaviors. It notably shapes clay nests in the form of elegant pots—a feat of nature's engineering in the insect world. Within these nests, it lays eggs and stocks caterpillars as food for its offspring. Its role in the ecosystem is vital, regulating caterpillar populations, thus contributing to maintaining the balance of the local ecological dynamics.

The species is on the IUCN Red List as not endangered, year of assessment 2009. The slender bank dragonfly occurs from Southeastern Europe and North Africa to Japan and Australia

The giant Crab Spider is a large spider native to the tropics; the largest reported individual had a leg span of 30 cm. This cosmopolitan spider is highly valued in some areas, as it's able to catch cockroaches and other indoor pests. Reportedly, it hunts even scorpions and bats. This spider is venomous and sometimes bites humans, but it's considered harmless.

Male and female chocolate brown. Male. Upperside, pale brown; forewing with a short impressed comma-like grey streak obliquely beneath the cell. Cilia yellowish white. Underside bright ferruginous brown. Palpi ferruginous brown. Female. Upperside dark chocolate brown without the impressed streak; cilia of hindwing pale orange yellow. Underside bright ferruginous brown.

D. chrysippus is a medium-sized butterfly with a wingspan of about 7–8 cm (2.8–3.1 in). The body is black with many white spots. The wings are orange, the upperside brighter and richer than the underside. The apical half of the forewing is black with a white band. The hindwing has three black spots in the center. The wings are bordered in black and outlined with semicircular white spots. This species exhibits slight sexual dimorphism, as the Male has large scent glands on his hindwings, which the female lacks. They appear as a large black spot with a white centre if viewed from the underside D. chrysippus is a polymorphic species, so the exact coloring and patterning vary within and between populations. It is similar in appearance to the Indian fritillary (Argynnis hyperbius), which may coexist with it.

This butterfly closely resembles Appias paulina but the males can be distinguished by the more acutely pointed forewing and the females by the narrower oblique black band on the underside of the forewing. Other differences are given below. Wet-season form: Males have the upper forewings irrorated (sprinkled) with black scales at the apex and anteriorly along the termen, much more sparsely and narrower in general than in A. paulina. On the underside, the apex of the forewing and the whole surface of the hindwing are pale dull ochraceous, sometimes with a faint pinkish tint, but never pale yellow as in A. paulina. The sexes are dimorphic; the females differ as follows: 1st form: On the upperside, the posterior tornal portion of the black area on the forewing is not inwardly rounded, but straight and generally diffuse. The underside is very like the underside of the dry-season form of A. paulina female. It differs, however, in the narrowness of the oblique curved black band, the outer margin of which is irregularly zigzag, and never evenly curved as in A. paulina. 2nd form: Markings as in the 1st form, but the ground colour on the upperside is entirely pale yellow. On the underside, the apical half of the cell and the disc of the forewing up to the black band are pale sulphur yellow. The oblique curved black band is as in the 1st form and the interspace 1 is whitish. The rest of the forewing and the entire surface of the hindwing are rich chrome yellow. The antennae, head, thorax and abdomen are much as in A. paulina, but the antennae are dusky black and more closely speckled with white; the underside of the thorax is white in males, never yellow. Dry-season form: Upper and undersides: similar to that of the wet-season specimens, but in the male the dusting of black scales on the upperside has almost, in some specimens completely, disappeared, while on the underside the ochraceous colouring is much paler. In the females both dimorphs differ but little from the dimorphs of the wet-season form, only on the upperside the black on the apical half of the forewing and on the terminal margin of the hindwing is more restricted, while on the underside the oblique curved black band that crosses the forewing is distinctly narrower with a tendency to become diffuse. The wingspan is 6 - 7 cm.

The colour and wing markings of both seasonal forms of M. visala closely resemble those of M. mineus. On the whole, however, M. visala runs larger, and as a rule both sexes (in the continental form, not in the insular race) can be discriminated from the males and females or allied forms by the shape of the forewing. This is, as a rule, produced and acute at apex, with the termen below sharply transverse. The males, moreover, have the sex-mark on the underside of the forewing rather bright ochraceous and very long, extending beyond the transverse bands crossing the wings. Race andamana, Moore. Male sex-mark on the underside of the forewing as in M. visala. Shape of wings much more rounded in both seasonal forms of both sexes; in this closely resembling M. mineus, but the ground colour of the wings is darker and the ocelli proportionately larger. Disposition of the ocelli apparently quite constant. Upperside: forewing, two ocelli, the posterior the larger; hindwing, none in the male, an obscure one in the female. Underside: both sexes, forewing with two, hindwing with seven ocelli; the posterior four of the latter disposed as in M. mineus.