RTH- 1963 24. C. melanotus 21 June Barrow Alaska Between calls after any P. subtilis appears - when they are 'unmated' or off a nest. One & today who was flushed from nest - did a rodent run distraction display & was immediately 'counted' by c & (ground-prep. display). She came on - kept - a low arc- flur shot distances & kept through the grass. He made several attempts to court her - & the flur off & performed territorial display. At the north-east corner of the plat - the c had a well-defined territory covering about 3-3½ acres. After watching her for awhile & seeing several boundary conflicts with adjoining &c. Suddenly - the c began to perform a precopulatory display to c & in the center / The territory - he did this twice & during a second time, I walked out to - knew not which was located in the territory & then was the inc. & on the nest. So - here we were with a nesting c & his family - going through a precopulatory display to a second c - any 200' away. When the c flushed from the nest - she came in contact with the other c - they