For all interested in further studies of Bird Language, please visit Jon Young's page:http://birdlanguage.com/
Jon has passed on his knowledge of the birds to the staff at Alderleaf both through his teaching in person as well as through the Advanced Bird Language CDs. He continues to share snippets of this knowledge through his Bird Language homepage. Please visit it and read all of his posts.
Also, remember to visit you sit spot regularly and pay attention to birds where ever you go. They always have something to teach us.