Orangutan who prefers Eastwood's work in Every Which Way but Loose

In what researchers are calling a clue to understanding how early humans (no, not the milkman) formed their own language, Bonnie the orangutan has taught herself how to whistle after hearing workers at the National Zoo (no, not the Senate) in Washington DC.

Bonnie even taught her orangutan pal Indah to whistle. Indah has created her own tunes, rather than copying what she heard, which puts her one up on the Monkees. And the whistling ape in the next cubicle.

Which makes this as good a time as any to revisit the career of Whistling Jack Smith, creator of the hit single I Was Kaiser Bill's Batman and more importantly, the whistler on the theme of The Good, the Bad and the Ugly.