a troop; these groups sleep or forage together. The Guinean troops are large multiple-male, multiple-female troops with 50–300 baboons. The harems consist of two to five females which mate with the dominant male. However, despite their similarities, Guinea baboon social behaviour has a few noticeable differences from that of Hamadryas baboons. Male guinea baboons are not as rigidly dominant as hamadryas baboon males, and unlike female Hamadryas baboons, female guinea baboons exert a more active role in leading the group. Males are also unusually tolerant of one another, and there is very little aggression in this species. Unusually for Baboons(and old world monkeys in general), Guinea baboons also share food. Guinea baboon troops are very fluid in their structure, as female guinea baboons sometimes spend lengthy periods of time away from males in temporary, all-female groups, and several males may gather together and cooperate with one another with little bickering. This flexibility has led some to compare guinea baboon behaviour to that of early human ancestors. Males frequently use reconciliation gestures to reduce male-male aggression and encourage cooperation, allowing troops to grow to large size and adapt to different circumstances. While male Hamadryas baboons forcibly acquire females for their harems by kidnapping them and utilizing neck-bites to condition them to stay near, female guinea baboons select males at their own leisure, males typically using facial expressions and gestures to guide their movement and grooming them to win over their loyalty. In Guinea baboons, Harem masters are noticeably less strict with their female consorts than Hamadryas baboon harem masters. Female Guinea baboons not only fraternize with females from other harems but even other males without being reprimanded by their male consort. Females approach males to initiate mating behaviour as they please and even mate with more than one male (although they mate with the harem master the most), a far cry from the more "faithful" female Hamadryas baboons. As seen in chimpanzees, Olive baboons and various macaque species, this promiscuity most likely is practiced to hide the paternity of their infants as a counter strategy against male infanticide, which occurs in Hamadryas baboons but hasn't yet been observed in Guinea baboons (although male guinea baboons have been observed temporarily kidnapping then returning infants). Competition for females between males is noticeably reduced or absent. Unlike Hamadryas baboons and some other species, Guinea baboons are not very good climbers and favor trees, rather