I saw these at Perryman Park in Harford County, MD on July 3rd, 2011.

These were in and around the picnic area lake at Susquehanna State Park, MD on July 31st, 2011.

I saw this one at Swan Harbor on July 15th, 2012.

I saw these at Perryman Park on July 22nd, 2012.

This one was at Perryman Park on June 23rd, 2013.

This one was there on June 30th, 2013.

I saw these at Susquehanna State Park on July 3rd, 2013.

This one was at Swan Harbor the same day.

I saw this Widow Skimmer at Perryman Park on June 28th, 2014.

This one was at Harford Glen on July 6th, 2014.

I saw several at Perryman Park on July 20th, 2014.

I saw this one at Perryman Park on July 19th, 2015.

I saw this one at Kenilworth Aquatic Gardens in DC on July 10th, 2015.

These were at the Patuxent Research Center on July 10th, 2015.

I saw this one there on September 5th, 2015.

This female was at Perryman Park on July 2nd, 2016.