File:Hyla arborea Gallikos 7 und 15,5 LT März 1982.jpg

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English: Sound images (oscillograms) of three pulse groups from mating calls of European treefrogs, recorded at 7 degrees Celsius (top) and 15.5 degrees Celsius air temperature (below). The calls were recorded at the Gallikos river near Thessaloniki, Greece. At rising temperature the duration of the pulse groups and the intervals between them decrease.
Deutsch: Schallbilder von drei Impulsgruppen aus Paarungsrufen des Europäischen Laubfrosches bei 7 Grad Celsius (oben) und 15,5 Grad Celsius Lufttemperatur (unten). Die Paarungsrufe wurden am Gallikos Fluss bei Thessaloniki, Griechenland, auf Tonband aufgenommen. Bei steigender Temperatur nehmen die Dauer der Impulsgruppen und die Intervalle zwischen ihnen ab.
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Author Prof. emeritus Hans Schneider (Geyersberg)

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current22:06, 4 March 2017Thumbnail for version as of 22:06, 4 March 20172,433 × 1,191 (273 KB)Geyersberg (talk | contribs){{Information |Description ={{en|1=Sound images (oscillograms) of three pulse groups from mating calls of European treefrogs, recorded at 7 degrees Celsius (top) and 15.5 degrees Celsius air temperature (below). The calls were recorded at the Gallik...

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