Why, that's just a little old canary bird fluttering in the breeze.
5 seconds sound clip from the Daffy Duck's Quackbusters movie soundboard.
You can hear this line at 00:34:02.704 in the DVD version of the movie.
Quote context
[...]
- He's a complete basket case.
- Monster!
- Why, that's just a little old canary bird fluttering in the breeze.
- You yellow dog of a cowardly Sylvester, you.
- Now, Sylvester, come on off of there.
- You ought to be declawed, you silly ninny, you.
[...]