Joyce and I saw several Northern Rough Winged Swallows flaying around with a group of Tree Swallows at Harford Glen park on April 20th, 2008.

The next bird was at Susquehanna State Park in early May 2008.

These were flying around the wet part of the new impoundment at Swan Harbor Farms on September 14th, 2012.

This one was flying in and out of a pipe under a footbridge at Susquehanna State Park on April 10th, 2013.

This one was in the same general place on April 26th, 2013.

I saw this bird near the Rock Run Mill on May 13th, 2013.

This one was near the Deer Creek bridge on April 16th, 2016.

This one was in the same place on May 7th, 2017.

I saw this bird at Lapidum on May 6th, 2018.