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.

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