You get this in chapter 20, In the cut-scene when you are talking to Sully his Parrot is sitting on a perch (Top Left corner most of the time) and during the cut-scene conversation between Drake and Sully every-time you see the Parrot just keep tapping him (front screen) and after 8 unique squawks you will get the trophy.
I had to do it twice as i couldn't get 8 unique in 1 go through, but just restart the chapter and go again.