Reply
Mon 9 Feb, 2009 02:22 am
By what evolutionary mechanism do migrating birds (e.g. Canada geese) end up at the same spot for overwintering year after year? Their ability to do this has always amazed me - we need maps and satnavs, they have neither of those.
@julesreubin,
julesreubin wrote:
By what evolutionary mechanism do migrating birds (e.g. Canada geese) end up at the same spot for overwintering year after year? Their ability to do this has always amazed me - we need maps and satnavs, they have neither of those.
Birds use a cluster of mechanisms, some of them quite mundane, like landmarks. Different species do it slightly differently. I'm not sure if Canada Geese have been tested specifically.
Stumble It!
Tweet This
Bookmark on Delicious
Share on Facebook
Share on MySpace