cicada

(redirected from cicadas)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

cicada

(sĭkā`də), large, noise-producing insectinsect,
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.
 of the order Homoptera, with a stout body, a wide, blunt head, protruding eyes, and two pairs of membranous wings. The front wings, which are longer than the rear pair, extend beyond the insect's abdomen. Male cicadas have platelike membranes on the thorax, which they vibrate like drum heads, producing a loud, shrill sound. Females of most species are mute. Characteristic songs are produced by members of different species; each also produces a noise indicating irritation, and some have special courtship songs.

There are about 2,000 cicada species distributed throughout the tropical and temperate regions of the world; they are most numerous in Asia and Australia. There are about 180 species in North America; adults of these species range from approximately 1 to 2 in. (2.5–5 cm) in length. The periodical cicadas (Magicicada species), found in the eastern half of the continent, have the longest known life cycles of any insect. Because of their periodic appearance they are often called locusts, although they are not related to true locustslocust,
in zoology, name for certain migratory members of the short-horned grasshopper family (Acrididae). Like other members of this family, locusts have antennae shorter than their bodies, song-producing organs on the forewings and hind legs, and hind legs well developed for
..... Click the link for more information.
.

Their life cycle takes 17 years in northern species (the so-called 17-year locusts) and 13 years in southern species; the two types overlap in parts of the United States. The female deposits her eggs in slits that she cuts in young twigs. In about six weeks the wingless, scaly larvae, or nymphs, drop from the tree and burrow into the ground, where they remain for 13 or 17 years, feeding on juices sucked from roots. The nymphs molt periodically as they grow; finally the full-grown nymphs emerge at night, climb tree trunks and fences, and shed their last larval skin. The winged adults, which generally emerge together in large numbers, live for about one week. Different broods mature at regular intervals, so that at least one colony is conspicuous in some part of the United States each year, and even in a given locality a brood may appear every few years.

Other North American cicadas (Tibicen species and others) are known as dog-day cicadas, or harvest flies, because the adults appear in late summer. Their life cycle is thought to be similar to that of the periodical cicadas, but in most species it is completed in two years.

Cicada larvae do little damage, but when adults appear in large numbers their egg-laying may damage young trees. Cicadas are sometimes kept for their song in Asia, as they were in ancient Greece. They are classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
..... Click the link for more information.
, class Insecta, order Homoptera, family Cicadidae.

cicada

symbol of eternal life. [Chinese Folklore: Jobes, 338]

cicada

symbol of talkativeness because of its constant, strident noise. [Folklore: Jobes, 338]

cicada

, cicala
any large broad insect of the homopterous family Cicadidae, most common in warm regions. Cicadas have membranous wings and the males produce a high-pitched drone by vibration of a pair of drumlike abdominal organs
References in periodicals archive ?
Insect cornucopia: various bird types prey on the season's first giant cicadas in an urban park in southeastern Brazil.
Sound pressure levels of some African cicadas (Homoptera: Cicadoidea).
New York, May 31 ( ANI ): A woman from New York has cooked a pizza with cicada as a topping.
Cicadas rely on the sap from tree roots for most of their lives, so without green space, they aren't going to last long enough to see the sun.
It's just sex, sex, sex for those cicadas - every 17 years.
individuals were easily disturbed from their perches, and the coloration and pattern of flight distinguished them from smaller grasshoppers, whose flight tended to be in an up-and-own arc versus the more horizontal pattern of the cicadas.
Ascending Mount Mulu, from near sea-level to a summit elevation of 2,377 metres, about the height of a 720-storey building, the team is here observing, studying, sampling, and collecting cicadas, moths, bats, rats, fungi, and more.
What actual scientific cicada news there was in 2013 didn't get much media attention.
From the measurements found that there are difference among mosquitoes and cicadas of two insect fascicle in the triangular serrated micro-structure either in size or shape, differed as follows: the mosquito has the small micro-structure size, cicadas micro-structure has larger one; the forward angle of mosquitoes microstructure is greater than the backward one, triangle tilts to the rear part of the fascicle, while the forward angle of cicada's micro-structure equals to the backward one, its microstructure is symmetric on bottom corner.
The next emergence of periodical cicadas in Indiana will be in 2015, when the 13-year Brood XXIII will emerge in the southwestern portion of the state (Kritsky 2004).
How Cicadas Make Their Sound Humans have marveled at the periodic emergence of cicadas for thousands of years, and as far back as the 1940s, scientists have tried to uncover the secrets of this strange insect.
How the cicadas manage to synchronize may be trickier to explain, though.