see http://news.bbc.co.uk/earth/hi/earth_news/newsid_9401000/9401733.stm ===============================
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 ===============================
Some of us would remember the example of Peppered Moth “industrial revolution evolution” taught in basic biology more than 45 years ago.
http://www.biologylessons.sdsu.edu/cartoons/23_moths.pdf
http://en.wikipedia.org/wiki/Peppered_moth_evolution
At the time we were heading for a looming ice age. We should all be dead by now.
Regards
Ian May
John Leonard wrote: ===============================
To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line)
http://birding-aus.org ===============================
Eagle Owls…? http://www.independent.co.uk/environment/nature/largest-owls-in-the-world-threaten-british-birds-930862.html
Cheers,
Graham Buchan
===============================
To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line)
http://birding-aus.org ===============================
It may be that a difference in colour may mean difference in the likelihood of being mobbed during the day, which exposes the owls to danger from diurnal raptors if they have to move, or otherwise making them more stressed and fatigued.
Or it could be that difference in colour produces a difference in hunting success at dusk and dawn.
John Leonard
What predator would selectively attack grey morph variation in Tawny Owl (See http://en.wikipedia.org/wiki/Tawny_Owl ) to the extent of altering their population dynamics?
Laurie Knight wrote: ===============================
To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line)
http://birding-aus.org ===============================