This Blue-winged Warbler was in the brush near the picnic area of Susquehanna State Park, MD on May 9th, 2009. Its rising then dropping song was very noticeable, and very different.

I saw this next bird in the exact same place on May 4th, 2010. Maybe it's the exact same bird?

Joyce and I saw two Blue-winged Warblers flying around the other side of the park picnic area on May 1st, 2011. This is one of them.

This bird was in the brushy field by the picnic area on May 12th, 2012.

This one was in the same place on May 10th, 2013.

Joyce and I saw this bird near the mill on May 4th, 2014.