I think the correct pronunciation of "pileated" is with a long "i", a long "e", and a long "a", as in "pie-lee-ated", but it's much more commonly pronounced (in Ontario at least), with a short "i".
"Scaup" rhymes with "hop", and "scoter" rhymes with "boater".
There, now you can speak their names with confidence! :wink:
It doesn't help that so many bird names have obscure and/or archaic origins. Pileated is actually a descriptive term meaning, "having a crest covering the pileum". Not a term that comes up much in my day to day conversation!
BB