see http://news.sciencemag.org/sciencenow/2011/09/dive-bombing-hummingbirds-let-th.html
Dive-Bombing Hummingbirds Let Their Feathers Do the Talking ===============================
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 ===============================
