Aphelocoma Sept. 3 Amis SW Prisoner's Harbor, Santa Cruz! Jays along narrow canyon checked for third time this morning. None have been collected from the area as yet. [Pars(]adults[recognizable by incompletely grown tail feathers; sexes recognizable by size differential)] are about 200 feet apart, as closely spaced as anywhere I have seen them here, or on the woodland for that matter. Of course, the habitat in this canyon area is exceptional from the standpoint of scrub-jay preferences, and one can probably regard the population there as a maximal density. Young of the year associate closely with adults, presumably their parents; though in only one case does there appear to be a normal-sized family group. One bird still feathered superficially with juvenile plumage was found at the same spot where it was seen on Aug. 31. The chief activity of the jays was foraging, both on the ground and in the oak foliage (?my impression is that as in the woodland birds, most foraging is done on the ground). Aphelocis, like ocellata, crops about the ground, throwing leaves and twigs to the side. On finding an acorn, it is taken to a branch and pounded and eaten or carried, as was seen once today, to a grassy spot on the opposite slope of the canyon and buried. The acorn-burying action was precisely as in ocellata — initial exploration