Richard Dawkins speaking about mimicry in Cuckoo eggs at the ASU Origins Project: Storytelling Of Science talk which also included Lawrence Krauss, Bill Nye, Brian Greene, Tracy Day, and Neal Stephenson.
Full talk available here:
Part 01 - http://www.youtube.com/watch?v=_J4QPz52Sfo
Part 02 - http://www.youtube.com/watch?v=40YIIaF1qiw