good research article. see also the related stories about N American birds and climate change. (this is a free website with a lot of science research articles)
http://www.sciencedaily.com/releases/2009/04/090415074856.htm ---- Join or Leave mou-net:http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net Archives:http://lists.umn.edu/archives/mou-net.html
