for several bird species - plus many other seasonal phenomena
http://futureofbirds.blogspot.com/2018/02/spring-migration-maps-2018-plus.html
William Mueller
Director, Western Great Lakes Bird and Bat Observatory
WGLBBO online: wglbbo.org
wpmueller1947@xxxxxxxxx
office 262-285-3374
cell 414-698-9108
blog: futureofbirds.blogspot.com
Port Washington, WI
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