People notice yellow stains....

 

From 2010.  I was brought onto this spot to storyboard several different versions and ultimately, this yellow bird idea turned into what you see below.  Below are some concept illustrations for VFX as well as the storyboards for the different versions. 

 

For the canary, I did a bunch of variations and we ultimately went with a very stylized looking one.

 

I can't find the spot for the storyboards below, but I did see it a few times several years ago.  Guess you'll just have to see the remix.