are terrestrial birds that predominately walk but will occasionally run. They are noted for their tight, cohesive flying. These birds also turn as a flock using two distinct maneuvers. The first is when the entire flock changes course or direction seemingly in synchronization. The second is a rotation, in which each bird shifts along the axis from head to tail. This produces a flash of color change from light to dark. Flight speed has been documented at 45 to 55 miles per hour. Dunlins are highly social birds that live in large flocks.