They cannot only sing, but they can yodel!
Yodeling (also yodelling or jodeling) is a form of singing which involves repeated and rapid changes of pitch between the low-pitch chest register (or “chest voice”) and the high-pitch head register or falsetto. The English word yodel is derived from the German (and originally Austro-Bavarian) word jodeln, meaning “to utter the syllable jo” (pronounced “yo” in English). This vocal technique is used in many cultures worldwide.
Alpine yodeling was a longtime rural tradition in Europe, and became popular in the 1830s as an entertainment in theaters and music halls. In Central Africa, yodeling was a form of communication announcing the yodeler’s location and identity. In the United States, traveling minstrels were yodeling in the 1800s, and in 1920 the Victor recording company listed 17 yodels in their catalogue. Music historians credit the first country recording to include yodeling to Riley Puckett in 1924. In 1928, blending Alpine yodeling with traditional work, blues, hobo, and cowboy music, Jimmie Rodgers released his recording “Blue Yodel No. 1”. Rodger’s Blue Yodel created an instant national craze for yodeling in the United States and, according to a black musician who lived near Rodgers in Mississippi, everyone, both black and white alike, began to copy Rodgers. The popularity lasted through the 1940s, but by the 1950s it became rare to hear yodeling in Country or Western music. The Swiss Amish maintain the practice of yodeling until today.