rk30+@andrew.cmu.edu (Ruth Kline) (06/22/91)
One of my neighborhood robins seems to have developed his/her own song style. During the "evening" or "rain" song (sorry I don't know the correct ornithological term), this bird inserts three extra notes, something like G-D-G or A-E-A. Kind of nice, and certainly unique to my ears. Is this a common occurrence among birds? Is it an inherited trait? Thanks for any info!