This link may be of interest – from the Dept of Archeology and Natural History at ANU. Long, scholarly and somewhat off topic but worth skimming just to be reminded of the complexity of life and the dedication of scientists. http://epress.anu.edu.au/wp-content/uploads/2012/01/ch12.pdf =============================== To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line) to: birding-aus-request@vicnet.net.au http://birding-aus.org ===============================