I saw several Caspian Terns in a group of gulls at the Havre de Grace marina on April 5th, 2008. The terns in the photos below are the birds with the large orangish bills and black caps on their heads.

Several Caspian Terns dove into the Susquehanna River for fish on April 28th, 2012.

I saw two Caspian Terns on Triadelphia Reservoir near Columbia, MD on September 15th, 2012.

This bird flew over the road by Shearness Pool at Bombay Hook NWR on August 10th, 2021.