Having lived in NW and Central Missouri for more than 20 years, I am
familiar with the sound of the bobwhite, and I have been hearing it here
in Cinebar and on the Discovery Park trail in Centralia for more than a
month. However, any mention of it to a birder or on a birding list gets
me only a disdainful denial of its possibility. But I have not let this
discourage me because I know a bobwhite when I hear one!! (smile)

The suggestion that someone might be purchasing bobwhites and releasing
them as game birds makes sense to me. And a Swainsons thrush does visit
my birdbath regularly, so until I can prove otherwise, I will take your
word for it that one of them could make a similar sound. (However, those
thrush have been around here for several years without us hearing the
"bobwhite" call, and when the thrush sang at my birdbath, he did not
sound at all like a bobwhite.) (still smiling)

Meantime, if someone is keeping an official record, there are Purple
finch and Black-headed grosbeak fledgings here in Cinebar now. There
are now five male and four female American Goldfinch patronizing the
finch feeder, the cowbird and most of the Band-tails have disappeared,
and all the Robin eggs did hatch!

Darlene
Cinebar