Sullivan, J. 1961 Erolia melanotus Pectoralis. Barrow, Alaska June 9 With Holmes at central marsh - saw the Pectoralis and heard song: "oop oop oop" Markings: heavy breast streaking - ends abruptly against white belly. June 11 Walking just to west of central marsh - heard the oop oop song. Saw the pectoralis. W/ air sacs much inflated flying along calling. At least 3 different birds called in this particular area. Also heard call later in afternoon (4:30) south of the drum area. June 17 While Holmes and I were setting out trapline III A + III B north of Vothi Area, a pectoral displayed and sang very close to us. There are unusual semaphore - then one stood still for intervals and then would inflate its chest and fly low "oop ooping". The bird continued this throughout the trap setting time (1530-1630). June 18 1530 - While checking trapline III B, I saw a o pectoral standing on an elevated clump of tundra just south of the trapline. His chest appeared partially inflated. The bird permitted close approach, and it turned out that his right