Things that go weird in the night

[martin butterfield <>]

Another member of the Carwoola Progress Association has submitted the following.  I repeat their final phrase: any ideas?

"Help
me, Martin....  The other night (at about 10.30pm) I heard something in the
trees on the neighbour's place that sound a bit like a kookaburra clearing
his throat: sort of deep raspy (growling almost) Whooop-Whooop usually/often
followed by a chuck-chuck-chuck-chuck (this was the bit that sounded like a
kookaburra clearing his throat).  Maybe not even a bird.  We - Hilary
and I - have heard this previously, never predictably.  We've both been out
with troches looking for it and never found it. Any ideas?"