more on weather and migration

Here in southeastern Wisconsin, dry conditions have certainly been the rule for many weeks. Since Jan. 1, the precip. total is 23.80 inches; the normal is 25.75 inches of precip. by this date; so we are 1.95 inches below normal.

However, do dry conditions affect migration?

See a good overview of fall weather and migration at:
http://ebird.org/content/ebird/news/fall-birding-basics

And a thought-provoking paper on changing bird migration dates can be found at:
http://www.int-res.com/articles/cr_oa/c035p037.pdf
 
(Image: Wikimedia Commons)