Song of the Mockingbird

I stole this tune from a mockingbird Where outside my window he was perched I kept the rhythm added rhyme And the words, well they're all mine The song he sang was a happy one I think he got from another bird in love When you whistle love it's hard to keep So much so it inspired me The tune I kept inside my head Until there was no whistle in my whistle left That's when in my mind I did decide I needed to add a few rhyming lines But I kept the tune of the mockingbird Just thought it could use a few good words Cause words can be a powerful thing When added to a bird that sings