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duet call comparison red-crowned crane Japan - China in Korea DMZ

  • actual: BWITB, Ormecon Pvt. Ltd.


Red-crowned crane unison and guard calls have been recorded in Japan (Hokkaido) and in Korea in DMZ (demilitarized zone, a wintering migration stop-over of Chinese / Russian RC cranes from HeiLong / Amur River region), and quantitatively compared. Result: the call structure is different; experiments showed that cranes from different populations do not "understand" each other (these populations have been separated for many hundred years).
Short summary: comparison
of Unison call pattern
(Red crowned cranes from
Hokkaido and from Mainland)
Recorded and evaluated by
Dr. Bernhard Wessling
(recorded in Hokkaido and Korea DMZ)
Typical Unison call patterns
Typical Unison call patterns
Comparison of Japanese and
Comparison of Japanese and
Chinese RC Cranes
Chinese RC Cranes
length of Unison: J - 22 sec, K - 12 sec
fem answer calls per male: J - 2.26, K - 2.15 K -
1 to 4 answer calls, J sometimes a short introduction before an
swer tact
complexity: Jm - 2.21, Jf - 2.57; Km - 1.91, Kf -
2.69 (Jf more frequencies at a time, Kf more variable in form)
pitch: Jm 1072, Jf 1160; Km 971, Kf 1073
Unison call pattern, GC pattern different
Japanese and Chinese RC Cranes have a different “language”:
The Japanese RC population was separated
from the Chinese mainland one sufficiently long
to develop their own call structure (“language”)
the 2 populations do not “understand” each
other (experiment!)
social and cultural aspects
bottleneck in Japan!
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