MacLean 1968 (10) Aphriza virgata 20 May) showing light under covers - leans way forward - sticks ass in other bird's face. No response. Quivers slightly, then relaxes. 3rd bird ca. 1 m. away ignores all this. Displayer (1) wanders away feeding. 2 follows loosely, feeding. Birds go behind sm. rock - emerge with 1 bird jajew'up. I think this is 2 - bird just postured towards ( I think 1 - posturer - is sl. smaller). 3 sits quietly several minutes, then wanders toward others, feeding. All out of sights as I take notes. All 3 suddenly fly away low over ground - less intense than yesterday's "chase". two birds (2+3?) giving jew, jajew... I think 1 - not vocalizing - was leading. 6:45 One bird displays overhead 7:30 One bird on same slope gave slight ja jew, then nothing, 7:46 flew across snow field to ridge c. 150 m. away. 7:50 Now gone. Didn't see it leave. 8:10 Bird displaying up over this area. fl ew until out of range of binoculars - c. 1/2 mile across canyon and over another ridge. this area now apparently vacant. 8:22 A bird comes in high, displaying.