GreatHornedOwl
Grumpy Armchair Birder
Larry Lade said:Information from The Audubon Society's "Encyclopedia of North American Birds" by John K. Terres states that the Ivory-billed Woodpecker makes (made) a sharp, plaintive, nuthatch like, single note, kent or pait, like tooting of a child's toy trumpet, sometimes this note is uttered in series, kent, kent-kent, kent.
But what widowmaker describes is more likely to be the "kik-kik-kik-kik-kik-kik-kik" call of the Pileated wp, which seems to be similar to the Black wp's call. There are several sites where you can listen to recordings of all these species, the Cornell lab site has recordings of both the Pileated and the Ivorybill ... perhaps Widowmaker could let his father listen to these, just to be sure.
I personally feel the Ivorybill's call could be mistaken for some sort of duck's call - no joke, it really does have a somewhat duck-like quality.