The Mason-Dixon line was surveyed by Charles Mason and Jeremiah Dixon between 1763 and 1767. It continues to serve as part of the boundaries for Delaware, Maryland, Pennsylvania, and West Virginia. It was originally surveyed to settle a territorial dispute between the colonies of Maryland and Pennsylvania.
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Icterus galbula - The Baltimore oriole is an eastern subspecies of the northern oriole. Their summer range covers a large area of the Eastern United States; their winter range extends as far south as Mexico and Central America. The male’s orange-yellow and black plumage is vivid when compared to the female’s pale coloration. Male juveniles do not assume the glossy black and orange colors until the male’s second year. Orioles remain solitary until the breeding season, but couples tend to remain monogamous.
