Forest Park St. Louis 7-8-10.
Mike Treffert (of J.B. Mike and Joe) told me of a pair of WTSP at the zoo.
Birds are in the Cenarius Vulture outdoor cage behind Bird House:

Less the caveat, these birds would be accidental summer visitor.
Accidental is one click above Extirpated.

LBIMO
Bill Rudden
St. Louis
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The Audubon Society of Missouri's Wild Bird Discussion Forum
ASM Fall Meeting: September 24-26 at Camp Clover Point
http://mobirds.org/