Top 20 Most Common Insects in Cambodia

The upperside of the rustic is ochraceous light brown. Its forewing displays some loop-like, slender, dark cellular markings with a broad, somewhat curved, transverse yellow discal band from costa to vein 1. The band does not reach the termen but broadens posteriorly.The margins of the forewing are irregularly sinuous, with the inner defined broadly with black, and produced outwards in interspaces 3 and 4. Below this, the margin is squarely indented inwards in interspace 2 and outwardly convex in interspace 1. There is a curved series of three black spots. The largest is in interspaces 1, 2 and 3. The apical area beyond the band is black, with a conspicuous yellow subapical spot in interspace 5, and a paler ill-defined similar spot above it in interspace 6. In the posterior, the black area is produced narrowly to the tornus and encircles a yellow spot near the apex of interspace 2. The hindwing features a transverse sinuous and very slender black line. This line is followed by a slender and somewhat lunular line; a transverse discal series of five black spots in interspaces 2 to 6; a postdiscal medially disjointed series or broad black lunules; a subterminal series of similar but straighter lunges; and a narrow terminal black band. The outer subbasal transverse line broadens at the costa, and is outwardly margined by pale spots in the interspaces. These are anteriorly white and well defined, and posteriorly obscure or often absent. The underside of the wing is much paler. The discal band on the forewing is pale, and the black lunules on the apical area are replaced by pale brownish ochre. There are some obscure markings in the cells of both the forewings and hindwings. Markings on the forewing include a discal, transverse, slender, chestnut-brown lunular line, bent inwards above vein 5, and bordered outwardly by a series of dark spots. The large black spot in interspace 1 is the same as that on the upperside. There are inner and outer transverse subterminal series of small dentate spots. On the hindwing are indistinct cellular markings. The outer subbasal dark transverse line is similar to that on the upperside, but is more clearly defined and very sinuous. There is a transverse discal series of uneven lunules, paler than the ground colour, followed by a series of dark spots. There is a postdiscal very obscure pale lunular band, and a subterminal series of dentate dark spots, often obscure or obsolescent. The antennae, head, thorax and abdomen are ochraceous brown. Beneath, the palpi, thorax and abdomen are a very pale ochraceous white. The caterpillar is brown, with a dorsal and lateral series of darker brown markings. The head has two slender branched spines. Succeeding segments on either side feature a lateral series of semitransparent similar brown spines. The pupa is green, studded with eight slender pink filaments and four small pink tubercles.

A small butterfly, the green dragontail has a wingspan of 40 to 55 millimetres (1.6 to 2.2 in). It is basically black and white in colour scheme, it has a very large white-tipped tail, 25 to 40 millimetres (0.98 to 1.57 in) long. The forewing has a triangular hyaline (glass-like) patch with black borders, and thin black stripes along the veins, forming six to eight spot/bands. It also has a pale band running obliquely across the pre-discal area. This band is continued onto the black hindwing which bears the long tail and prominent abdominal wing fold. In this species, the pale bands are light green while in its closely related species, Lamproptera curius, they are white. Also in L. curius, the white band has a hyaline outer edge. Sexes are alike, but the female is duller and has a ventral copulation groove before the tip of the abdomen. The males of this species do not have the sex mark (scent organ) found in L. curius.

A. florea is called the dwarf honey bee due to its small size compared to other honeybees. A worker is typically 7–10 mm in body length and its overall coloration is red-brown. A colony builds a single, exposed comb usually on tree branches or shrubs. A. florea produce honey that is harvested and eaten in Thailand and Cambodia. They are excellent pollinators, which gives them an important ecological role in the places they inhabit. Drones carry a thumb-like bifurcation called the basitarsus, which is located two-thirds along the length of the tibia. The fimbriate lobe of A. florea has three protrusions and they sting using two stylet barbs. Apis florea and its sister species together comprise the subgenus Micrapis, and are the most primitive of the living species of Apis, reflected in their small colony size, and simple nest construction. The exposed single combs are built on branches of shrubs and small trees. The forager bees do not perform a gravity-oriented waggle dance on the vertical face of the comb to recruit nestmates as in the domesticated Apis mellifera and other species. Instead, they perform the dance on the horizontal upper surface where the comb wraps around the supporting branch. The dance is a straight run pointing directly to the source of pollen or nectar the forager has been visiting. The distinctiveness of the two species A. florea and A. andreniformis was established unequivocally in the 1990s. A. florea is redder and old workers always have a red first abdomen (younger workers are paler in colour, as is the case in giant honey bees); A. andreniformis is generally darker and the first abdomen segment is completely black in old bees. Distinguishing characteristics of the dwarf honey bees are outlined below:

Coccinella transversalis, commonly known as the transverse ladybird or transverse lady beetle is a species of ladybird beetle found from India across southern and southeastern Asia to Malesia and Australia. It is not to be confused with Coccinella transversoguttata, a widespread species in Europe and North America also known as the transverse ladybird. The alternative vernacular of small transverse ladybird may be used for C. transversalis in instances where these two species are discussed together. The transverse ladybird was first described by Danish zoologist Johan Christian Fabricius in 1781 as Coccinella transversalis and still bears its original name. Fabricius' description predated Carl Peter Thunberg's naming of this species as C. repanda by several months. Measuring 3.8 to 6.7 millimetres (0.15 to 0.26 in) long and 3.3 to 5.45 millimetres (0.130 to 0.215 in) wide, the transverse ladybird shows little variation across its wide range. It has a black head with predominantly bright red or orange elytra boldly marked with a black band down the midline and two lateral three-lobed markings.

Hypolimnas bolina, the great eggfly, common eggfly or in New Zealand the blue moon butterfly is a species of nymphalid butterfly found from Madagascar to Asia and Australia.

Dry-season form - Upperside black, with pure white markings. Forewing discoidal streak clavate (club shaped), apically truncate, subapically either notched or sometimes indistinctly divided; triangular spot beyond broad, well defined, acute at apex, but not elongate; discal series of spots separate, not connate (united), each about twice as long as broad; postdiscal transverse series of small spots incomplete, but some are always present. Hindwing: subbasal band of even or nearly oven width; discal and subterminal pale lines obscure; postdiscal series of spots well separated, quadrate or subquadrate, very seldom narrow. Underside from pale golden ochraceous to dark ochraceous almost chocolate; white markings as on the upperside, but broader and defined in black. Forewing: interspaces 1a and 1 from base to near the apex shaded with black, some narrow transverse white markings on either side of the transverse postdiscal series of small spots. Hindwing a streak of white on costal margin at base, a more slender white streak below it; the discal and subterminal pale lines of the upperside replaced by narrow white lines with still narrower margins of black. Antennae, head, thorax and abdomen black; the palpi, thorax and abdomen beneath dusky white. Wet-season form - Differs only in the narrowness of the white markings and in the slightly darker ground colour and broader black margins to the spots and bands on the underside. More than 20 subspecies have been described. This species has been observed to make sounds whose function has not been established.

Male upperside: somewhat more than half the forewing from base velvety black, apical half dull fuliginous; cell-area with or without two short transverse orange bars; a blue patch above, the tornus; the outer margin of the basal black area obliquely zigzag in a line from the middle of costa to apex of vein 2, including a large discal, generally obscure ocellus, which, however, in some specimens is prominently ringed with orange yellow. Beyond this a broad white irregularly oblique discal band followed by a short oblique preapical bar from costa; a small black orange-ringed ocellus beneath the bar, a subterminal continuous line of white spots in the interspaces and a terminal jet-black slender line; cilia alternately dusky black and white. Hindwing blue shaded with velvety black towards base; a postdiscal black white-centred orange and black-ringed ocellus in interspace 2, a round minutely white-centred velvety-black spot (sometimes entirely absent) in interspace 5; the termen narrowly white, traversed by an inner and an outer subterminal and a terminal black line; cilia white. Underside forewing: basal half with three black-edged, sinuous, broad, ochraceous-orange transverse bands, followed by the pale discal baud; ocelli, preapical short bar, subterminal and terminal markings much as on the upperside; the discal band margined inwardly by a broad black angulated line which follows the outline of the black area of the upperside. Hindwing irrorated (sprinkled) with dusky scales and transversely crossed by subbasal and discal slender zigzag brown lines and a postdiscal dark shade, on which are placed the two ocelli as on the upperside; subterminal and terminal faint brown lines, and a brownish short streak tipped black at the tornal angle below the lower ocellus. Female. Similar, with similar but larger and more clearly defined ocelli and markings; the basal half of the forewings and hindwings on the upperside fuliginous (sooty) brown, scarcely any trace of blue on the hindwing. Antennae brown, head reddish brown, thorax and abdomen above brownish black: palpi, thorax and abdomen beneath dull white.

Male upperside is black. Forewing with the following green markings: a spot at the extreme base of the costal margin, a transverse short bar near base of cell and seven spots beyond, two and two except the apical spot which is single; two spots beyond apex of cell; a spot at base of interspaces 1a and 1, followed by two oblique short macular bands; a discal series of spots decreasing in size towards the costa, and a postdiscal series of smaller spots that begins with two in interspace 1; the spots in interspace 7 in both series are out of line, placed outwards. The hindwing has three series of similarly-coloured markings that ran transversely across the wing more or less parallel to the dorsal margin, the upper markings (those in interspace 7) white; a short greenish stripe at the extreme base of the wing. The underside is fuliginous (sooty) brown or brownish black, more or less suffused with pink along the costal margin, on apical area and along the outer margin of the discal markings on the forewing, broadly along the dorsal and terminal margins and at base on interspaces 6 and 7 on the hindwing; markings similar to those on the upperside but less clearly defined and somewhat more grey in tint. Hindwing black, inwardly red-margined spots superposed on the pink area in interspaces 6 and 7. Cilia very narrow, pale pink. Antennae, head, thorax and abdomen black, thorax above and the abdomen on the sides streaked with greenish grey; beneath is ochreous grey touched on the thorax with pink. Female is similar, but with a streak of greenish white along the dorsal margin on both upper and undersides.

The scientific name of the species was first validly published in 1782 by Caspar Stoll.

It is a medium-sized damselfly with brown-capped yellow eyes with a narrow equatorial black band encircling them. Its thorax is black on dorsum with a narrow bluish-yellow humeral stripe, split in two and overlap each other. This stripe is followed by a broad black fascia, on the middle of the lateral side of the thorax, peppered with small pale yellow spots. The lateral sides beyond this is yellow, marked with an irregular black stripe on the anterior border of postero-lateral suture, and another one on the middle portion of metepimeron. Abdomen is black on dorsal half up to segment 8; paler on ventral half and with bluish-white basal annules. Segment 9 is black on basal half and bluish-white on apical half. Segment 10 is bluish-white. Anal appendages are pale blue or creamy white. The superiors are as long as segment 10, conical, and tapered at apices. The inferiors nearly twice the length of superiors. The inferiors are pale within, blackish-brown externally. In the related species, Copera marginipes, the superiors are half the length of segment 10 and inferiors are at least four times the length of superiors. The inferiors tipped with black beneath. The female is more robust compared to the male, dull in colors and marks less conspicuously defined. Tenerals of both sex can be whole white with few black markings. Commonly found in among undergrowth along the banks of rivers and streams, often in the hills.