Frequencies of observed physical proximities among a collection of 17 free-ranging grey kangaroos. Observations were made in the Nadgee Nature Reserve in New South Wales. There were 18 kangaroos in the original report, but one (number M11) was never observed and is therefore dropped from this network.
Two kinds of dominance ranks are included. One, ss, is the ratio of an animal's number of "successes" to its number of "involvements." The other, ps, is calculated by assigning an animal 2 points for each other animal it bests on more than 50\