Willie Whistle hosted afternoon television on Channel 38 WSBK-TV, in Boston. I remember him being on in the 1970s, but not earlier. I wasn't a fan, as I was already in high school. My sister watched, and I found his high-pitched voice to fluctuate between irritating and fascinating (depending on the level of my sobriety at the moment).
This clip is actually a feature story about Willie and his encounter with a snake:
There is surprisingly little on the internet about Willie Whistle.