http://aco.muhlenberg.edu/documents/Klem-2009-Prev-wils-121-02-314-321-e.pdf Find this paper and more at the website of the Acopian Center for Ornithology at Muhlenberg College. See their website at: http://aco.muhlenberg.edu/ William P. Mueller E-mail: iltlawas@xxxxxxxxxxxxx 414-698-9108 Conservation Chair, Wisconsin Society for Ornithology (WSO) Project Coordinator, Milwaukee County Avian Migration Monitoring Partnership (MCAMMP) on the web: http://home.earthlink.net/~iltlawas/index.html blog: http://bluebirdslaugh.blogspot.com/ #################### You received this email because you are subscribed to the Wisconsin Birding Network (Wisbirdn). To UNSUBSCRIBE or SUBSCRIBE, use the Wisbirdn web interface at: //www.freelists.org/list/wisbirdn. To set DIGEST or VACATION modes, use the Wisbirdn web interface at: //www.freelists.org/list/wisbirdn. Visit Wisbirdn ARCHIVES at: //www.freelists.org/archives/wisbirdn.