butterfly, any of a large group of insects insect, invertebrate animal of the class Insecta of the phylum Arthropoda . Like other arthropods, an insect has a hard outer covering, or exoskeleton, a segmented body, and jointed legs. Adult insects typically have wings and are the only flying invertebrates.
..... Click the link for more information. found throughout most of the world; with the moths moth, any of the large and varied group of insects which, along with the butterflies , make up the order Lepidoptera. The moths comprise the great majority of the 100,000 species of the order, and about 70 of its 80 families.
..... Click the link for more information. , they comprise the order Lepidoptera. There are about 12 families of butterflies. Most adult moths and butterflies feed on nectar sucked from flowers. In the process they may transfer pollen from one flower to another, and many plants depend on moths or butterflies for pollination. Like moths, butterflies have coiled, sucking mouthparts and two pairs of wings that function as a single pair; the wings are covered with scales that come off as dust when the insect is handled.

Butterflies can be distinguished from moths in several ways: the antennae of butterflies are knobbed at the tips, while those of moths almost never have terminal knobs and are often feathery; the body of a butterfly is more slender and usually smoother than that of a moth; butterflies are active by day, while most moths are nocturnal; when at rest most butterflies hold the wings vertically, while most moths flatten them against the surface on which they are resting. The skippers are intermediate in characteristics, but they are usually called butterflies. Some butterflies migrate, usually traveling toward the equator in the fall and away from it in the spring. The North American monarch butterfly makes mass migrations of several thousand miles.

Coloration

The Lepidoptera, especially the butterflies, are known for the beautiful colors and patterns of their wings. Red, yellow, black, and white pigments are found in the scales; the blues and greens, and the metallic, iridescent hues found especially in tropical species, are caused chiefly by refraction. Some butterflies are protectively colored to match the environment. Many conspicuously colored species are distasteful to birds, which learn to avoid them, and others are protected by their resemblance to the distasteful species (see mimicry mimicry, in biology, the advantageous resemblance of one species to another, often unrelated, species or to a feature of its own environment. (When the latter results from pigmentation it is classed as protective coloration .
..... Click the link for more information. ). Among the most beautiful butterflies are the swallowtails, found all over the world, the monarchs, and the peacock and tortoiseshell butterflies.

Metamorphosis

Metamorphosis is complete, that is, the insect goes through four stages: egg, larva larva, independent, immature animal that undergoes a profound change, or metamorphosis, to assume the typical adult form. Larvae occur in almost all of the animal phyla; because most are tiny or microscopic, they are rarely seen.
..... Click the link for more information. , pupa pupa (py
..... Click the link for more information. , and adult. The eggs, which hatch in 2 to 30 days, are usually laid on a plant that the larva (called a caterpillar caterpillar (kăt`əpĭl'ər, kăt`ər–), common name for the larva of a moth or butterfly .
..... Click the link for more information. ) uses for food. Most caterpillars eat leaves. After the last of several molts the larva is transformed into a pupa with a hard, often sculptured outer integument, within which it changes to the adult form. The butterfly pupa is called a chrysalis, or chrysalid. Most chrysalids (unlike the pupae of most moths) are not enclosed in a cocoon; however, they are usually suspended from some object by a silken thread and may have a partial covering. Except in those species that winter in the pupa stage, the adult usually emerges from the integument in two or three weeks. Members of some species winter in the egg stage, others as larvae or adults. The adults of most species, however, live only about a month.

Classification

Butterflies are classified in the phylum Arthropoda, class Insecta, order Lepidoptera. The true butterflies form the superfamily Papilionoidea, and the skippers form the superfamily Hesperoidae.

Bibliography

See A. B. Klotz, Butterflies of the World (1976); R. M. Pyle, The Audubon Society Handbook for Butterfly Watchers (1984); M. Daccordi et al., Simon & Schuster's Guide to Butterflies and Moths (1988); D. Carter, Butterflies and Moths (1992).

butterfly

Any of more than 14,000 lepidopteran species found worldwide. Unlike moths, butterflies are active during the day and are usually brightly coloured or strikingly patterned. Distinctive features are club-tipped antennae and a habit of holding the wings vertically over the back when at rest. With few exceptions the larvae and adults eat plants. Butterflies are classified into five or six families. The metalmarks of the family Lycaenidae are found chiefly in the New World tropics; some members of the family Nymphalidae are called snout butterflies. Other species (with their families) include the white and sulphur butterflies (Pieridae), the swallowtail butterfly (Papilionidae), the blue, copper, and hairstreak butterflies (Lycaenidae), and the admiral, monarch, and painted lady (Nymphalidae).