Migratory birds follow paths that are known as flyways, and in North America, there are four main ones.   Atlantic flyway - goes all the way from Greenland to Florida and covers the entire Atlantic coast of North America. Birds that migrate to South America or the Caribbean will often be seen along this flyway. Mississippi flyway - this funnel-shaped flyway extends from the Mississippi and Missouri rivers to the Gulf of Mexico. Birds making their way to South and Central America may use this route. Central flyway - this flyway runs along the east side of North America, south to Mexico and north to Canada. Along the route, birds pass over the west side of the Rocky Mountains, Texas, and Oklahoma. Pacific flyway - this flyway extends all the way from Alaska down to Patagonia along the Pacific coast of both North and South America.