Related Clues:

• Warbled
• Sang, Swiss Alps-style
• Sang on high?
• Sang à la Jimmie Rodgers
• Sang in Tyrol, e.g.
• Sang, in a way
• Sung in Tyrolean style
• Warbled in the Alps
• Sang Alpine-style
• Sang in the Alps
• Sang alpine songs
• Sang on a peak
• Hit a lot of high notes
• Sang Swiss-style
• Did alpine calls