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Cicada

Order Hemiptera
Family Cicadidae and Tettigarctidae

Cicada
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Cicada • Order Hemiptera - Family Cicadidae / Tettigarctidae
The loudest insect in the world, are cicadas. Their drone are one of the most recognisable sound in Australia, and herald the approaching summer.

Cicadas are classified in the order Hemiptera, then the Homoptera, although the Homoptera is considered an order in its own rights, in some publications it is designated as a suborder of the Hemiptera. They are then members of the superfamily Cicadoidea, the the Family Cicadidae, or in the case of two unusual Australia species Family Tettigarctidae. The order Hemiptera include all insects with piercing and sucking mouth-parts, such as aphids and scale insects.

Cicadas are mainly found in warm-temperate to tropical habitats. There are more than 200 species of cicadas in Australia, most of which belong to the one large family, the Cicadidae. There are about 1,500 species world-wide.

Cicada - Orange Drummer (Thopha colorata) © Greg Sully, Dec 2007Singing
The song of the cicada is only produced by the males as a mating call. Each species has its own distinctive call and will only attract females of its own kind, even though similar species may co-exist. Some large species such as the Green Grocer, Yellow Monday, and Double Drummer produce a noise in excess of 120 decibels at close range, this is approaching the pain threshold of the human ear. In contrast, some smaller species have songs so high in pitch, that the noise is beyond the range of human hearing.

How they produce their songs is still being researched today, but the organs that produce the sound are the tymbals, a pair of ribbed membranes at the base of the abdomen. Contracting the internal tymbal muscles causes the tymbals to buckle inwards and produce a pulse of sound. By relaxing these muscles, the tymbals pop back to their original position. In some species of cicadas, a pulse of sound is produced as each rib buckles.

Shed skin of a cicada.Both male and female cicadas have organs for hearing. A pair of large, mirror-like membranes, the tympana, receive the sound. The tympana are connected to an auditory organ by a short tendon. When the male sings, it crease it's tympana so that it won't be deafened by its own noise.

Many species of cicada sing during the warmth of the day. This noise actually repels birds, probably because the noise is painful to the birds' ears and interferes with their normal communication. The males of many cicada species group, such as the Green Grocer, Yellow Monday and Double Drummer, group together when singing. This increases the volume of noise, makes it harder to locate where the sound is coming from and reduces the chances of bird predation. Other species of cicada only sing at dusk. These species tend to be weak fliers, such as the Bladder Cicada. They gain some measure of protection from birds by confining their activity to dusk.

Shed skins of cicada.In addition to the calling or mating song, many species possess a distress song. This is usually a broken and erratic noise emitted when an individual is captured. Some species also have a courtship song, a quiet call that is sung only after a female has been attracted nearby using the calling song.

Feeding
Cicadas feed on a huge range of plants, including eucalypts and grasses. They feed by piercing the surface of plants with their mouth stylets. The sap is then sucked up through a tube formed by the concave surfaces of two of the stylets. They are not harmful to trees, although in some cases the growth of the tree may slow, due to the amount of sap consumed. Cicadas do not bit, even when handled, although their claws may feel sharp as they cling to the skin.

Birds, bats, spiders, ants, mantids and tree crickets all prey on cicadas. They also provide food for the larva of the Cicada-killer Wasps and are also parasitised by the larvae of Feather-horned Beetles (family Rhipiceridae).

Lifecyle
It is thought that the nymphs of the larger, common Australian species of cicada may live underground for around 6-7 years. This may explain why adult cicadas are more abundant during some seasons than others, with peaks occurring every few years.

In contrast to its nymph stage, the life of the adult cicadas is very short, lasting a matter of weeks. Once the adult cicadas have mated, the female cicada lays its eggs by piercing the plant stems and inserting the eggs into the slits. The eggs hatch into small wingless cicadas known as nymphs. They fall to the ground and burrow below the surface, where they live on the sap from plant roots. Over the period of several years, the nymphs grow, shedding their skin at intervals.

Once the nymph reaches full size, it will dig its way to the surface with specially adapted front legs. It usually surfaces as night falls in the late spring or early summer. Then, climbing the nearest tree trunk or other fixture, it will shed its skin for the last time, emerging as a fully-winged adult cicada.

Source: Various including Australian Museum Online: Fact Sheets Cicadas,
The Wonderful World of Insects: The Singing Cicadas

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Common Name

Cicadas are known by many names in Australia, with many of the common names given to cicadas being created by children. Some examples of their names include:
Common Name Scientific Name Where Found
Black Prince Psaltoda plaga (Walker) NSW, QLD
Bladder Cicada Cystosoma saundersii (Westwood) NSW, QLD
Bottle Cicada Glaucopsaltria viridis QLD
Brown Bunyip Tamasa tristigma QLD
Cherrynose • Whisky Drinker Macrotristria angularis (Germar) NSW, QLD, SA, VIC
Corroboree Cicada • Green Whizzer Macrotristria intersecta (Walker) NT, QLD, WA
Double Drummer Thopha saccata (Fabricius) NSW, QLD
Floury Baker Abricta curvicosta (Germar) NSW, QLD
Great Montane Squeaker Pauropsalta rubristrigata QLD
Green Grocer • Yellow Monday • Masked Devil Cyclochila australasiae (Donovan) NSW, QLD, SA, VIC
Hairy Cicada Tettigarcta crinita (Distant) NSW, VIC
Mangrove Cicada Arunta interclusa QLD
Northern Cherrynose Macrotristria sylvara (Distant) QLD
Razor Grinder Henicopsaltria eydouxii (Guérin-Méneville) NSW, QLD
Redeye Psaltoda moerens (Germar) NSW, QLD, SA, TAS, VIC
Tasmanian Hairy Cicada Tettigarcta tomentosa (White) TAS
Tiger Prince Macrotristria godingi (Distant) QLD
Scientific Classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadomorpha
Superfamily: Cicadoidea
Family: Cicadidae
Genus: Many
   
Family: Tettigarctidae
Genus: Tettigarcta

Cicada-Killer Wasps • Genus Exeirus

Found throughout Australia and sometimes mistaken for hornets because of their size, there are no hornets in Australia, Cicada-killer wasps hunt in trees for cicadas. Once found, the wasp stings and paralyses its victim, then the paralysed cicada is flown or dragged to the wasp’s underground nest where an egg is laid on it. The wasp then seals the nest, having provided its larva with fresh food. Sometimes the wasp returns to the exact spot where it captured its prey to feed on the sap that leaks from the hole made by the cicada in the tree, where it was feeding.

Cicada-killer wasps are up to 4 cm in length, and are found in urban areas, health, forest and woodlands habitat.

Source: Wildlife of Sydney • Cicada-killer Wasps Fact File • FaunaNet • Australian Museum Online

 
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