There are several species of cicadas in Ontario.
All are large in size (2-5 cm long) robust and somewhat triangular in shape.
Their antennae are very short, and some are black and green in colour.
The wings are held over the back in a sloping fashion and are membranous.
Cicadas are very attractive and different in form from most other insects,
and often attract interest when they are found.
The common species in Ontario are referred to as the dog-day harvest flies.
They have a life cycle of four years or more.
Cicadas are well known for their high-pitched, shrill call.
The sound is produced by the male, which has powerful muscles
attached to the side of membranes that can be vibrated very rapidly.
This droning sound is produced on hot, humid days in July and August.
Singzikaden (Cicadidae) sind eine Familie innerhalb der Unterordnung der Rundkopfzikaden (Cicadomorpha).
Die Insekten sind in der Lage durch Stridulation von Menschen hörbare Laute zu produzieren.
Dazu verfügen sie über speziell ausgebildete Trommelorgane (Tymbale).
Auf ihre artspezifischen und damit bestimmungsrelevanten Gesänge nimmt die deutsche Bezeichnung Bezug.
Dass die Gesänge hauptsächlich von den Männchen ausgehen, war schon den alten Griechen bekannt und verleitete den griechischen Dichter Xenarchos zu dem Ausspruch:
„Glücklich leben die Zikaden, denn sie haben stumme Weiber“.
pictures:
guild-rez 8/2009
information:
PEST DIAGNOSTIC CLINIC
Laboratory Services Division,
University of Guelph
Ontario. Canada
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