GRYLLIDAE: TRUE CRICKETS
True crickets have flattened bodies and long antennae. Only male crickets chirp, they having a thickened, ridged vein on the left forewing which, when raised to a 45º angle, can be rubbed against a rough surface of the right wing to create the species specific song. Four types of song exist, a loud calling song to attract a mate; a quite courting song when the female is close; an aggressive song triggered by the presence of another male and a copulatory song given just after sperm deposition. There are about 900 species worldwide which are mostly nocturnal in behaviour. The diet is omnivorous, they take both plant and animal matter, as well as decaying items. Tarsal formula 3-3-3.
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Designed by Paul Smith 2006.
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Photographs on this page were taken by Paul Smith, Regis Nossent, Leila K and Chris Elder and are used with their permission.
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FIGURE 1 - Unidentified sp. - PN Tte Enciso, Departamento Boquerón (Paul Smith July 2006).
FIGURE 2 - Unidentified sp. - PROCOSARA, PN San Rafael (Chris Elder November 2007 - ECOSARA Biodiversity Database).
FIGURE 3 - Unidentified sp. - Encarnación, Departamento Itapúa (Paul Smith December 2007).
FIGURE 4 - Unidentified sp. - Hotel Tirol, Departamento Itapúa (Regis Nossent June 2005).
FIGURE 5 - Unidentified sp. - PROCOSARA, PN San Rafael (Paul Smith June 2008 - ECOSARA Biodiversity Database).
FIGURE 6 - Unidentified sp. recently emerged - PROCOSARA, PN San Rafael (Leila K July 2008 - ECOSARA Biodiversity Database).
FIGURE 7 - Unidentified sp. - Estancia Laguna Blanca, Departamento San Pedro (Paul Smith October 2008).
FIGURE 8 - Unidentified sp. - Itabó Itaipú Reserve, Departamento Alto Paraná (Paul Smith November 2008).
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