Razorbills, a cousin to the puffin, nest in colonies on cliffs. Before they lay eggs, Razorbills take part in two unique social behaviors. In one, the Razorbills swim round and round in a tight mass, then dive as one. Next, they surface with heads aligned and bills held open. In another behavior, dozens of birds swim in a line, then zig-zag in a synchronized pattern across the ocean’s surface. Learn more at BirdNote.org.