wildlife vet benard ssebide assured us we were on the right path.s of the gorillas around here? >> yes, seen some already. >> our porters breezed along unfazed. we not so much. then hours after trekking, suddenly there they were. we spotted a mother first high in the trees, gorging on twigs. soon we were surrounded by all 19 members of an extended family, including a massive silverback and another mother cradling her infant. we had put on our masks, not to protect ourselves, but to protect the gorillas from any infection we might be carrying. amy bond is with gorilla doctors, an international conservation group. she told us how they identify each gorilla. >> just like humans where we each have our own unique fingerprint that helps us be identifiable as an individual, gorillas have unique nose prints. >> a nose print? >> a nose print. and that's what allows us to identify those individuals and so we go through and we make sure we get each individual in the group that we can do a visual assessment, looking for signs of illness or injury. >> bond and w