Holmes, R. 1962 4 June Barrow, Alaska chase was a the ground - it kept its wings at 45°, tail cocked strongly (but not spread) body like slightly forward. The behavior was giving the chatter trial (again not a clear distinct "motor"). - There is none of a purely silly case - when is given as an introduction to the aerial display & preliminary to the "motor-cycle"? [illegible] In this posture - it moved toward the feeder ? (who paid no attention) in a swaying fashion - probably moving 30° to left side & then back again. All the while the bill was being given. Finally The birds who had previously been chased - finished displaying & returned. The ground display - lifted both wings - low trial & took flight - flying behavior As of the bird - as they flew off in a dramatic chase across the open tundra. 5 June Several pairs seen on lowland-march habitat - SW of Britton's Area & NE of the ridge - E of South Sall Coyson. These pairs were doing considerable chasing among themselves & between pairs.