I have long been interested in mockingbirds since I learned long ago that there allegedly was one in the Arnold Arboretum whose song was said to be recognizable as beginning of a Beethoven composition. Here in Van Nuys, mockingbirds are very common, and I have heard many of them sing. But I have never heard them imitate another bird, or any music. Maybe Wordwind's bird was trying to learn the music she was playing. Dear WW: have you any reports of mockingbirds copying other birds songs, or phrases of music?