Use our interactive map to learn about the sites most used by Semipalmated Sandpipers and Red Knots during their migration across North America.
Weighing about as much as a D-size battery, Red Knots fly up to 15,000 km (9,300 miles) during their yearly migrations.
Some Semipalmated Sandpipers fly up to 4,000 km (2,500 miles) non-stop over the ocean between stopover sites.