An amusing list of song errors in films.
BIRD SONGS Out of Place
Field Guide to Hollywood Song Birds
BY: Robert Winkler
http://pages.cthome.net/rwinkler/hollwood.htm
History of Cardinals
The Status of the Cardinal in California
BY: Alden H. Miller
The Condor, Vol. 30, No. 4 (Jul. - Aug., 1928), pp. 243-245