Joybell, a parrot (long-billed or otherwise) that had heard a kookaburra would probably do a pretty good imitiation. They can live a very long time (Winston Churchill's parrot is still alive at over 100), so it wouldn't have had to hear one recently. There was a truly awful kids' tv programme on UK tv in the 60s called "The Tinga and Tucker Club", hosted by Aussie "Auntie" Jean Moreton; T & T were two koalas, and there was a Wombat called Willie and a kookaburra kalled Katie. (These were probably glove puppets, but who can tell? We're not Australian. I think Auntie Jean may have been a puppet too ...) Anyway, this means that any parrots who have seen it may do kookaburra impressions (or kookaburra impression impressions, if you see what I mean) even after all these years; if it had been sold on in the US, who knows where it could have led?

Hoo-hoo-hoo-hoo-ha-ha-ha-ha, as we strinophones used to say.

Steve