RTH 1963 25, C. melanotus 21 June Barrow, Alaska faced each other - and (?) went into - Tail up aspens posture - gave Mr. & call note + Dr. other- fly off - followed by Dr. 8. Bussom - The one moving off - was the non-nesting bird - The aspens were being incubating & NEST - PS#10 - 30' off plat (11.3) - 4 eggs + me. 9 - who was courting for several mins. by a lower, seated 8). - Nest a stick 1 polyg - Semenonder by moss & a small clump / some white offended - about 15% core per egg. NEST - #11 - 4 eggs, me. 9. (5.3) - in Arctognathus or low poly pteryx - some enophym clumps - 60% covering by R grasp. Two 8's - chasing for several minutes- over an area / facade. The chasers were high above the ground - flying side by side - then severing loose fall & making large circles - jabber calls were given almost constantly. After flying fast - They would set their wings horizontally down - dropped & glided for several hundred feet, descending landing. On the ground, the 8th went into a hunched posture,