Patelka 1946 Cyanocorax dickeyi Oct. 18 El Batel, 5100 ft., Sinaloa leisurely feeding. Progress through the forest was mainly by hopping through the vegetation and gliding over short distances through openings. The wing beat was regular and somewhat heavy, suggestive of that of Nucifraga. Flight through larger, unshaded areas was distinctly more rapid than through the [illegible] openings in the forest. Amid Aphelocona, these Jays would move up from limb to limb, climbing several feet before gliding to another tree; in this behavior, the heavier weight of Cyanocorax was distinctly evident as the jumps upward from limb to limb were more labored. After about the first half hour, the flock apparently broke into two, as during the latter half of my observation period, I saw only 5 or 6 individuals. The amount of calling also fell off at about the time the flock broke into two. During the period when the flock was reduced, one individual was observed perching quietly and in full view, the others moving about and feeding in the near vicinity. One of these moved toward the quietly perched bird, and stowed up next to it, remaining perched there for 15-20 seconds in parakeet-