According to "Birds of Missouri", Latest date: 10, Sept
1961. He does add, though:
"Widmann (1907) states, without giving any details, that birds are recorded
until the end of Sept."
A book I have from 1947 by Sterling P. Jones, "Migratory and Permanent
Resident Birds" in the St. Louis Region, gives the date of 9/30 fro
Looks like you have a late bird!
Pat Lueders, Webster Groves, MO