Please do not modify this conversation, though feel free to discuss its conclusions.
I looked for attestations of this word a few days ago to see if I could add it as part of my project of adding terms derived from Native American languages, and I couldn't find any actual uses of the word, so I'm surprised to see that it's a bluelink. If it was added because the OED has 3 citations, I'll be thrilled. - -sche(discuss) 06:46, 16 September 2012 (UTC)
The OED does have 3 citations, 2 of them are under the spelling "wapacuthu" (), the other is from a dictionary (another form: "wap'acut"). DTLHS (talk) 07:00, 16 September 2012 (UTC)
I suppose I should have said I'd only be thrilled if the OED had 3 citations of use... as it is, both "wapacut" and "wapacuthu" (which seems to be a scientific name and thus Translingual/Latin, not English) seem to be dictionary-only words. (Also, when I look for other attestations of "wapacuthu", I see mostly warnings even stronger than the one in the book you link to, that the people who described said bird had no idea what they were talking about.) - -sche(discuss) 07:09, 16 September 2012 (UTC)