Note: All records listed here have been accepted by PORC and published in their Annual Report unless otherwise noted. All records are listed in reverse chronological order.
Marysville, Perry County; March 23, 2011. Photos by Lou Carpenter. (Under Review)
Bristol, Bucks County; August 1, 2010. Photos by Devich Farbotnik and Holly Merker.
Near Newburg, Cumberland County; March 20, 2010. Photos by Matt Sabatine.
Marysville, Perry County; March 19, 2010. Photo by Devin Bosler.
Easton, Northampton County; November 18-21, 2009. Photos by Dave DeReamus.
Near Columbia, Lancaster County; April 10, 2009. Photo by Justin Bosler. (Under Review)
Moraine State Park, Butler County; November 28-30, 2008. Photos by Malcolm Harter, Geoff Malosh, and Steve Gosser.
Franklin Cove in Tullytown, Bucks County; January 10, 2007. Photos by Cameron Rutt.
Falls Township Community Park near Tullytown, Bucks County; December 9, 2004. Photo by Bill Etter.
2011
Black-headed Gull — Marysville, Perry County; March 23, 2011. Photos by Lou Carpenter. This adult bird was found and photographed in fog and light rain. 
2010
Black-headed Gull — Bristol, Bucks County; August 1, 2010. Photos by Devich Farbotnik and Holly Merker. This adult bird was found at a riverside parking lot along Radcliffe Road.
Black-headed Gull — near Newburg, Cumberland County; March 20, 2010. Photos by Matt Sabatine. This 1st-year bird was found by Ramsay Koury. 
Black-headed Gull — Marysville, Perry County; March 19, 2010. Photo by Devin Bosler. This adult bird was found by Ramsay Koury on the 14th. 
2009
Black-headed Gull — Easton, Northampton County; November 18-21, 2009. Photos by Dave DeReamus. These photos were taken at the ‘Forks of the Delaware’ on November 21st. This 1st-year bird represents the 1st record for the Lehigh Valley area. 
Black-headed Gull — near Columbia, Lancaster County; April 10, 2009. Photo by Justin Bosler. This 1st-year bird was found by Jonathan Heller. 
2008
Black-headed Gull — Moraine State Park, Butler County; November 28, 2008. Photos by Malcolm Harter. This bird was found by Dave and Debbie Darney on November 27th, representing the 2nd record for Butler County. 
This photo shows a good comparison between the Black-headed Gull and the Bonaparte’s Gulls on the right. Note the Black-headed’s larger size and dark red bill and legs compared to the Bonaparte’s Gulls pink legs. 
Black-headed Gull — Moraine State Park, Butler County; November 28, 2008. Photo by Geoff Malosh. 
Black-headed Gull — Moraine State Park, Butler County; November 28, 2008. Photos by Steve Gosser. 
2007
Black-headed Gull — Franklin Cove in Tullytown, Bucks County; January 10, 2007. Photos by Cameron Rutt. 
2004
Black-headed Gull — Falls Township Community Park near Tullytown, Bucks County on December 9, 2004. Photo by Bill Etter. 
