I saw this butterfly at Swan Harbor Farm in Harford County, MD on July 24th, 2010.

I saw this one at Cape May, NJ on July 30th, 2010.

This butterfly was at Swan Harbor on August 21st, 2010.

I saw this one at Turkey Point in Cecil County, MD on September 25th, 2010.

This one was at Swan Harbor on July 3rd, 2011.

I saw a number of Clouded Sulphurs at Perryman Park on July 22nd, 2012.

This one was at Swan Harbor on August 17th, 2012.

I saw this one at Swan Harbor on June 23rd, 2013.

This one was Assateague Island on July 16th, 2013.

I saw this one at Bombay Hook on September 10th, 2013.

This butterfly was at Swan Harbor on June 28th, 2014.

These were also at Swan Harbor on July 20th, 2014.

I saw this one at Swan Harbor on August 3rd, 2014.

This one was at Longwood Gardens, PA on August 9th, 2014.