Hell, my brain cell is getting lonely. Just remembered, back in the 70s, when I was setting up an Environmental Ed Centre at Tautuku, near the southern tip of the South Island (NZ), I'd give the visiting kids a "Folk" history of the area (mainly song) on one night of their week-long visit. It was not long after I'd heard 'ultrasound' recordings of the actual whale's calls. I gave the kids an imitation by whistling into an empty whisky bottle. It wasn't flash, but OK. Anyone else had a go at giving the whale's side of the song?

I'm practicing now, but not doing well - the whisky bottle is all-but-full. Will report in a couple of hours.

Cheers - Sam