Top 20 Most Common Insects in Campania

The adult geranium bronze butterfly's wingspan ranges from 15–23 mm in males and 18–23 mm in females. The wings are brown/bronze with a white border outlining the wings. The underside is a grey-brown with darker bands interlaced with white, creating an intricate pattern. The hindwings contain an eye spot in order to divert predators from attacking. The male and female are similar in appearance.

The southern green shield bug larvae molt five times before they reach their mature size. They are named for their unpleasant scent and are considered pests due to their preference for feeding on leguminous plants such as soybeans. Wasps and flies that parasitize the southern green shield bug are sometimes used as biological controls for its population.

Its slow and floating flight pattern makes it easy to identify the scarce swallowtail as it soars over gardens, orchards, and scrublands. The butterfly has a large presence across Europe, the Middle East, and Asia. The adult lifespan is brief, only two or three weeks. Planting flowers like blackthorn can encourage the butterfly to visit a garden.

Colias croceus has a wingspan of 46–54 millimetres (1.8–2.1 in). The upperside of the wings is golden to orange yellow with a broad black margin on all four wings and a black spot near the centre forewing. Usually these butterflies settles with its wings closed, consequently the black margin of the uppersides of the wings is difficultly visible. The underside lacks the black borders and is lighter, with a more greenish tint, particularly on the forewings. In the forewing underside is the same dark spot as on the upperside, but often with a light centre; the hindwing underside has a white centre spot, often with a smaller white or dark dot immediately above it. Sometimes, a row of black dots occurs on the underwings' outer margins, corresponding to where the black border ends on the upperside. Females differ from the males in having yellow spots along the black borders on the upperside. In flight, Colias croceus is easily identifiable by the intense yellow colouring, much brighter than that of the lemon-yellow male common brimstone which also lacks black markings. Like all Colias species they never open their wings at rest. In a small proportion of females (about 5%) the golden upperside colouration is replaced by a pale cream colour. These females have been distinguished as form helice. The pale form helice does not seem to be that distinct as intermediates exist and the variation is to some extent related to humidity during development, with dryer conditions producing paler colouration. These pale forms helice can be confused with Berger's clouded yellow (Colias alfacariensis) and the rarer Pale clouded yellow (Colias hyale). Even the palest C. croceus tends to have more black on the upperside however, in particular on the hindwings. Young caterpillars are yellow-green, with a black head. Later they become completely dark green, with a white red spotted lateral line after the third moult. The pupae are green and have a yellow side stripe. This species is rather similar to Colias myrmidone, Colias chrysotheme, Colias erate, Colias hyale, Colias alfacariensis, Colias caucasica, Colias aurorina.

Hipparchia statilinus has a wingspan of 6 - 7 cm. These butterflies are rather variable, especially in the shades of brown present on the wings and in the intensity of the white bands. Usually the basic color of the upperside of the wings is dull brown in the male, lighter or ocher in the female, with a fringe on the edges. Two blind or very discreetly pupillated black eyespots are present on the forewings, while the hindwings show a very small eyespot. The underside is marbled with ocher and dusty white bands. On the underside of each forewing there are two black eyespots ringed in yellow, the upper one with a white central spot. Between the two black eyespots there are two white spots. On the underside of the hindwings there may be a black spot near the posterior and anal margin.The caterpillars are greenish-beige with green-brownish longitudinal stripes.

Often confused for the ladybug, multicolored asian ladybeetle (Harmonia axyridis) is a separate species that, unlike the ladybug, is a household pest. It is considered particularly annoying for its habit of returning to places from which it is removed. One of the most variable species in the world, there are many different colors and patterns multicolored asian ladybeetle may display, making identification potentially difficult.

The half-edged wall jumping spider (Menemerus semilimbatus) is one of the thousands of jumping spider species. The females have a dark body with light brown legs while the males are a similar light brown color all over, only with larger front legs. These spiders are found in most areas of the world, commonly near houses and gardens.

Unique for its black coloring with white spots, the white spotted rose beetle has spread across Europe and into Asia by hitching a ride on traded plants. It's a voracious eater that consumes many parts of plants in addition to pollen and nectar, so some label it as a garden pest.

As evidenced by its name, brown marmorated stink bug (Halyomorpha halys) is most recognizable for its ability to exude a nasty, foul-smelling odor if disturbed. Capable of subsisting on over one hundred species of plant, it has become an enormous pest for many farmers in the U.S., costing over $30 million annually in apple crop losses alone. It often invades homes in autumn, as soon as the weather begins to chill.

The white-legged damselfly or blue featherleg (Platycnemis pennipes) is a damselfly of slow-flowing, muddy waters. It occurs from the Atlantic to Siberia and is often abundant throughout its range.