Pitkin 1950 A. coeruleans Oct. 29 Wilcat Canyon. Jays common and conspicuous. Calling frequent. Scattered in pairs and in small groups, of 3 or 4 individuals. Also short flights frequent, a number of them observed to be chases, and others were those of individuals of a loose flock, coming into a Laurel tree for fruits. A territorial chase was observed along a willow thicket on an east branch of the creek. A pair moved eastward casually whereupon the male (larger bird) of a neighboring pair, beyond and also to east, chased the others for about 30 feet and then turned around in flight and returned upward while the first pair flew on. Another chase was observed along the west side of the creek. The chase was short, but one jay displaced another thereby, and the latter flew up into the canopy of a large tree. The thought occurred to me, that movement upward brings escape from territorial attack if it is in the lower and mid-strata which are of chief interest to scrub jays. In addition to frequent short flight and attempts at high general milling about, two cross-canyon flights were observed: one was completed, but