I came across this YouTube video of a David Allen Sibley lecture to the Jewish Community Center of San Fransciso while doing some research for an Op Ed piece I hope to write. It's too good not to keep for reference or to share with others.
The other thing is that I am completely impressed with his selection to lecture the Jewish Community
Center. Just goes to show that not only birders are interested in this topic.
The video is 1:19 long. I watched through the hawk owl part and decided I didn't want to lose track of this. It's easy to go forward and backward. Enjoy!