Many thanks to all the helpful people that had suggestions and offers to help find a Eurasian Tree Sparrow while in town.
I was able to see one at a private residence within an hour of landing.
Thanks, you folks are great!
PS. If anyone is interested in Boreal Owls, check out the Minnesota list server. There's an irruption up in Duluth, MN happening right now. Some folks seeing up to 7 Boreals in a day.
The Audubon Society of Missouri's Wild Bird Discussion Forum
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ASM Spring Meeting: May 3-5, 2013 in St. Joseph, MO. Details and Online Registration