Kapitel 5: Der Mandschurenkranich (grus japonensis)

5. Unison call structure ("pattern")

This is the most complicated to find out, as we do not have a computer based "pattern analysis" available. The qualitative comparison of many sonograms showed indeed some striking pattern differences:

  • whereas the J-RC m display a rather uniform inverse U or V form call, with the "right" (= downside, ending phase) often having a "rough" (= many frequencies in parallel overlaid) structure, the K-RC m show many different forms, and quite seldom an inverse U or V, if at all
  • K-RC m often show instead of this an upward step in the middle of the call tact, and on the down side (towards the end) very seldom the "rough" part
  • J-RC f have very sharp, steep inverse V's with a high frequency range within an extremely short time period; sometimes, the "V" is no more there, just an overlay of about 6 - 8 frequencies is to be seen as the answer call
  • K-RC f show longer answer calls, also with many frequencies, but not as many as in J-RC f, sometimes, the call gets so long that it takes the form of a male call! it is characteristic, that the form of the f calls can vary strongly within even one unison call display.
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Hauptmenue | Vorwort | Kap 1: Bild und Ton | Kap 2: Kranicharten | Kap 3: Kennenlernen, Verhalten und Intelligenz
Kap 4: Graue Kraniche | Kap 5: Mandschurenkraniche | Kap 6: Schreikraniche | Kap 7: Resumés | Kap 8: Anhang