Platycleis montana (Kollar, 1833) [Invalid]

The calling song consists of a series of quiet echemes, each lasting about 1-2 s, sometimes repeated regularly at the rate of one every 3-4 s, but at other times less frequently and more irregularly. Oscillographic analysis shows eachecheme to consist of about 60-140 alternately quieter and louder closing hemisyllables following one another at the rate of about 40-70/s. The quieter closing hemisyllables last about 4-11 ms and the louder ones about 7-17 ms; opening  hemisyllables, always quieter than the closing hemisyllables, are often also present. The echemes are usually quieter at the beginning, reaching maximum intensity after about 10-20 syllables. Sometimes the echemes end in aseries of lous closing hemisyllables without the interposition of quieter ones (Figs 340, 342), and occassionally there are two quieter closing hemisyllables between two consecutive louder ones. There are no microsyllables. [1]

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