My warbler identification skills aren't very good, so I lean heavily on guidebooks. The bird pictured above is a Yellow-rumped Warbler (Dendroica coronata) sitting in a plum tree in my backyard.
It's impressive to think about how far these small birds travel, flying from Central & South America to the northern US and Canada. Of course this also means that habitats separated by thousands of miles are interlinked and that ecosystem disruption in one place will affect the others.
National Geographic's guide suggests several area birdwatching sites that have large numbers of warblers in the spring.
2011 Warbler festivals
Tawas Point Birding Festival May 12-15, 2011
Kirtland’s Warbler Wildlife Festival May 21, 2011
Cerulean Warbler Weekend, June 3-5, 2011.
While it's a three and a half hour drive from Kalamazoo, I can't resist adding northern Ohio's immodestly named festival: Biggest Week In American Birding May 5-15, 2011