I am TERRIBLE at it...I've got blue jays, mourning doves, red tailed hawks, crows and robins (turdus migratorius) down cold (except when the jays get cheeky and give RTH calls) but I hear so many other songs that I just can't place. And when I get out the guide, it gives these unimaginable phonetics to songs....anyway there is one song I have been trying to place for years....to me it sounds like a real sing song "yoo-hoo".....any suggestions of songs that I can look up to see if it matches?