Originally a formidable group of 42 members, the Susa family underwent a significant transformation in 2009, splitting into four distinct families: SUSA, KARISIMBI, ISIMBI, and IGISHA. Led by the dominant silverback Impuzamahanga, the Susa group now comprises 19 individuals, showcasing a delicate balance of three silverbacks, five adult females, three blackbacks, two sub-adults, three juveniles, and three infants.