In Espuña is "crickets." In fact it is not common in these latitudes that refer to them as locusts, but always as cicadas. In neighboring populations that term is more common, especially among older people.
In any case we refer to the insects of the family Cicadidae and in the specific case of the photograph that accompanies Cicada barbara.
On the peninsula are present C. barbara, C. barbara subsp. and C. lusitanica orni. The best way to differentiate one species from another is by singing, as Cicada barbara continuous chirp while Cicada orni does intermittently. Besides the species C. orni is more common in the northern half of the peninsula, while in the southern half is more common Cicada barbara.
This insect belongs to the group of Hemiptera, which are recognized among other things by having an oral appliance in the form of "peak articulated." This peak is used to insert the stems and roots of plants and feed the sap, so suffer.
These insects are the males who sing his signature song while perched to attract females. They use a stridulatory apparatus located on the sides of first abdominal segment. The stridulatory apparatus consists of chitin-coated membranes called toms, and air bags that act as sounding boards. Each species gives its song to a different frequency and intensity. In the links at the bottom of the post I facilitated a link to a website where you can hear the calls of different types of insects of the family Cicadidae, including Cicada barbara and C. Orni, to appreciate differences.
The female cicada lays her eggs in holes in wood, usually of living trees, so when they hatch, the nymphs fall to the ground where they dig using their front legs swelled up to the roots of the tree or a plant adjacent which feeds by removing sap. Only emerge from their underground shelter to develop the adult stage and reproduce. Their life cycle can range from one to several years.
For this reason, the horn is considered a secondary pest especially in the cultivation of olives, which seems to have special predilection.
have more information on these links:
- http://www.cicadasong.eu/cicadidae.html (A very interesting site where you can hear the songs of different species of cicadas .
- http://www.mapa.es/ministerio/pags/biblioteca/plagas/BSVP-24-04-803-816.pdf (Study on the Impact of Cicada sp. in olive cultivation and their treatment)
- http://es.wikisource.org/wiki/La_cigarra_y_la_hormiga_ (Samaniego ) (I could not miss a link to the famous fable of Samaniego)
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