Mavis Lorenz can. She was the oldest person on our Wild Bear Adventure, 81, and as full of energy as any of us. She could whistle whole melodies in a lovely trilling style. She said her mother taught her how. I've never heard any other woman who could whistle like that. Not just a bar, but an entire melody. She liked to whistle songs for Jon and me to see if we could guess the title. But she would only do show tunes, like "oklahoma". She was insulted when I asked her to do "My Old Kentucky Home."
Taking a peek on google today, I see she's a well known character on google. She has a great "hee hee hee" laugh too. She even climbed Everest to base camp K2
or was it K3? when she was in her 60s as a single woman with a sherpa, entering through Pakistan. Earlier in life she'd been a p.e. teacher. whew I bet she was tough.