"Atticus said to Jem one day, 'I'd rather you shoot at tin cans in the back yard, but I know you'll go after birds. Shoot all the blue jays you want, if you can hit 'em, but remember it's a sin to kill a mockingbird.'
That was the only time I ever heard Atticus say it was a sin to do something, and I asked Miss Maudie about it.
'Your father's right,' she said. 'Mockingbirds don't do one thing but make music for us to enjoy. They don't eat up people's gardens, don't nest in corncribs, they don't do one thing but sing their hearts out for us. That's why it's a sin to kill a mockingbird.'" Page 90
To Kill a Mockingbird by Harper Lee
I've been waking up in the mornings to the song of a mockingbird. I love mockingbirds. They're noisy and raucous, but they have a wonderful song. We have a mocking bird around here and yesterday morning, because I could sleep in a bit, I just lay there listening to him sing. He doesn't have his own song as far as I know, he imitates the songs of others, but somehow you know its him. You always know it's him!