The Purple Martins of Mason-Dixon Historicall Park: This blog will document the Purple Martins arrival, nesting, hatching, development of brood and departure annually, as the Purple martins make Mason-Dixon Historical Park their home from Spring till Fall

250th Anniversary Celebration set for 2017!: "Celebration of the end of the historic Mason-Dixon Line survey"

National Geographic: "Saving the Mason-Dixon Line"

Explore the Line: Scenes, markers and roads from along the western end of the most-famous border in the United States

Dunkard Creek Watershed Association