Singing birds. Songbird. Hummingbird. Whistling bird. Crooner: "Egrets, I've met a few... But then gain, too few to mention...."
I couldn’t find the cartoon itself online, so settle for this description: http://likelylooneymostlymerrie.blogspot.com/2012/04/157-i-only-have-eyes-for-you-1937.html
I couldn’t find the cartoon itself online, so settle for this description: http://likelylooneymostlymerrie.blogspot.com/2012/04/157-i-only-have-eyes-for-you-1937.html