1950 Apheloconus coerulescens. May 21 Wildcat Canyon A pair of jays move through brush of canyon bottom ahead and to left of me. They evidently enter or almost-enter territory of adjacent pair which comes down from a side-draw and when the two pairs are about 10 feet apart, one bird of the second pair chases the one of the first pair for a short distance through scrubby forestward and The second individual of the first pair turns and this pair then moves back (north) to the area where I first saw them. The second pair also move away from the area of the encounter in the opposite direction. August 16 U.C. Campus. Group of three immature jays, followed by male into eucalyptus and poplar trees where a brief chase occurs. Female follows male (both birds undergoing tail molt, immatures not; latter also with rectrix points farther apart when tail spread) Immatures move on, pair returns to cedar from which immatures left earlier, and male gives requiring call loudly from a top branch. Another jay is calling similarly within hearing distance. Adult male then drops down over opening giving knock-knock note.