By Cecile Mantovani and Olivia Le Poidevin

GENEVA, Dec 10 (Reuters) – Switzerland’s centuries-old alpine yodelling tradition could soon be added to a U.N. list recognising it ‍as a cultural treasure.

A decision on Switzerland’s bid to have yodelling added to UNESCO’s intangible cultural heritage list, which seeks to safeguard and promote oral traditions, craftsmanship and cultural knowledge, was scheduled for review by Sunday.

Yodelling is a form of singing that ‌alternates between deep, resonant chest tones and ‌bright, soaring head notes in rapid succession. Historians trace it to the Central Alps, where herders once used the echoing calls to summon their flocks or send messages across rugged mountain valleys.

Yodel singer Anastasia Soeur from the “Coeur des Yodleuses,” an all-female

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