Describe some of the members of Group 4 from Fossey's first observations in 1967.

In addition to Old Goat, Whinny and Digit, there were two additional silverbacks in the group, Uncle Bert and Amok. The group had a total of fourteen members in 1967, including a female Fossey named Flossie and another juvenile named Papoose. Old Goat and Flossie had babies, named Tiger and Simba.