To determine if a rank order (RO) would be established among a group of 5 female squirrel monkeys, 14 behaviors were observed and performance in water dominance tests was recorded. Significant positive RO correlations were found between active contact and chasing, and between urine-washing and closed genital display. Significant negative RO correlations were found between active contact and huddling, and between chasing and huddling. The RO determined from the results of the water dominance tests was unstable. It was concluded that the communication system in a subadult female squirrel monkey colony could not be described in terms of a linear RO.