Holmes, R 1962 Erythia ferruginea 3. 11 June Barrow, Alaska They landed about 100 yards away - One bird going in to a hunched posture with head extended forward - neck & regular raised. Then was Dan a flutter (very) - & a possible attempt at copulation (!) - Then both took off - flying in a low long-lasting (2-4 min) flight over the tundra. The birds were never more than 6' off the ground - but covered an area 300 x 200 yards - The flight was not erratic - They flew directly - one behind the other - both birds using a full wing stroke - But the beat was rapid & could not be considered a distinct display flight (i.e. not butterfly-like or moth-like etc.) more than a chase. Several times upon landing, the chase went into a hunched posture - usually forward with neck pulled in & down - tail was always in natural shoulder down position. The note given is actual chase. It's a quiet, high-pitched, fluttering note - heard almost continuously. Usually - the two birds would land separately - at least 30' apart - sometimes 100'.